SE543847C2 - A transmission for a vehicle - Google Patents

A transmission for a vehicle

Info

Publication number
SE543847C2
SE543847C2 SE1951420A SE1951420A SE543847C2 SE 543847 C2 SE543847 C2 SE 543847C2 SE 1951420 A SE1951420 A SE 1951420A SE 1951420 A SE1951420 A SE 1951420A SE 543847 C2 SE543847 C2 SE 543847C2
Authority
SE
Sweden
Prior art keywords
transmission
gear pair
shaft
coupling element
wheel carrier
Prior art date
Application number
SE1951420A
Other versions
SE1951420A1 (en
Inventor
Jörgen Forsberg
Mårten Dahlbäck
Stefan Karlsson
Original Assignee
Scania Cv Ab
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 Scania Cv Ab filed Critical Scania Cv Ab
Priority to SE1951420A priority Critical patent/SE543847C2/en
Priority to DE102020131693.3A priority patent/DE102020131693A1/en
Publication of SE1951420A1 publication Critical patent/SE1951420A1/en
Publication of SE543847C2 publication Critical patent/SE543847C2/en

Links

Classifications

    • 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
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
    • F16H37/04—Combinations of toothed gearings only
    • F16H37/042—Combinations of toothed gearings only change gear transmissions in group arrangement
    • 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
    • B60K20/00—Arrangement or mounting of change-speed gearing control devices in vehicles
    • 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
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/02—Arrangement or mounting of electrical propulsion units comprising more than one electric motor
    • 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
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/02—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of clutch
    • 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
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/06—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing
    • B60K17/08—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing of mechanical 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
    • B60K6/36—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 transmission gearings
    • 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
    • B60K6/36—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 transmission gearings
    • B60K6/365—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 transmission gearings with the gears having orbital motion
    • 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
    • B60K6/42—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
    • B60K6/50—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
    • 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
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B60L15/2054—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed by controlling transmissions or clutches
    • 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
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/66—Arrangements of batteries
    • 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
    • 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
    • B60W10/115—Stepped gearings with planetary gears
    • 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
    • F16H61/686—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 orbital gears
    • 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
    • F16H61/70—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 change-speed gearing in group arrangement, i.e. with separate change-speed gear trains arranged in series, e.g. range or overdrive-type gearing arrangements
    • 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
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • B60K2001/0405—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion characterised by their position
    • B60K2001/0438—Arrangement under the floor
    • 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
    • B60K25/00—Auxiliary drives
    • B60K2025/005—Auxiliary drives driven by electric motors forming part of the propulsion unit
    • 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
    • B60L2200/00—Type of vehicles
    • B60L2200/36—Vehicles designed to transport cargo, e.g. trucks
    • 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
    • B60L2220/00—Electrical machine types; Structures or applications thereof
    • B60L2220/40—Electrical machine applications
    • B60L2220/42—Electrical machine applications with use of more than one motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/10—Road Vehicles
    • B60Y2200/14—Trucks; Load vehicles, Busses
    • B60Y2200/142—Heavy duty trucks
    • 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
    • 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
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • 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
    • Y02T10/72—Electric energy management in electromobility
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S903/00—Hybrid electric vehicles, HEVS
    • Y10S903/902—Prime movers comprising electrical and internal combustion motors
    • Y10S903/903—Prime movers comprising electrical and internal combustion motors having energy storing means, e.g. battery, capacitor
    • Y10S903/904—Component specially adapted for hev
    • Y10S903/915—Specific drive or transmission adapted for hev
    • Y10S903/917—Specific drive or transmission adapted for hev with transmission for changing gear ratio
    • Y10S903/919—Stepped shift

Abstract

The invention relates to a transmission (2) for a vehicle (1), the transmission (2) comprises: a first main shaft (24) and a second main shaft (26), wherein the first main shaft (24) is configured to be connected to a first propulsion unit (4) and the second main shaft (26) is configured to be connected to a second propulsion unit (6); an output shaft 28); a lay shaft (32) connected to the first main shaft (24), the second main shaft (26) and the output shaft (28); a first gear pair (G1) connected to the first main shaft (24) and connectable to the lay shaft (32) by a first coupling element (S1); a second gear pair (G2) connected to the second main shaft (26) and connectable to the lay shaft (32) by a second coupling element (S2); a third gear pair (G3) connected to the lay shaft (32) and to the output shaft (28); and a range gearbox (34) comprising: a planetary gear (36) comprising a sun wheel (38) connected to the output shaft (28); a ring wheel (40) connectable to a transmission housing (64); and at least one planet wheel (42) and a planet wheel carrier (46) configured to be connected to drive wheels (16) of the vehicle (1); wherein the transmission (2) comprises a fourth gear pair (G4) connected to the first gear pair (G1) and connectable to the planet wheel carrier (46). The invention also relates to a method, performed by a control device (100), for shifting gears in a transmission (2) for a vehicle (1). The invention also relates to a vehicle (1).

Description

A TRANSMISSION FOR A VEHICLE TECHNICAL FIELD The invention relates to a transmission for a vehicle, a vehicle, a method performedby a control device for shifting gears in a transmission for a vehicle, a computer pro-gram and a cornputenreaciable medium according to the appended claims.
BACKGROUND Heavy vehicles, such as trucks and busses, may be propelled by means of internalcombustion engines. ln order to reduce the consumption and dependence on fossilfuels, hybrid powertrains have been developed. A hybrid powertrain typically combinethe use of a main propulsion unit, such as an internal combustion engine, with a sec-ondary propulsion unit, such as an electric motor driven by a battery. ln order to com-pletely avoid using fossil fuels, all-electric vehicles have been developed. All-electric vehicles are propelled by means of at least one electrical machine/electrical motor.
Heavy vehicles propelled by means of electrical machines may also be provided witha transmission in which rotational speed and torque between the electrical machines and drive shafts of the vehicle may be transmitted and changed by gear shifting.
Conventional heavy goods vehicles may be equipped with a range gearbox, whichconsiderably gears up the torque from the propulsion unit to the driving shafts. Sucha range gearbox doubles the number of gearing possibilities and usually comprises aplanetary gear, with a low and a high gear, respectively, with which the gearing pos-sibilities of the main gearbox may be divided into a low range position and a highrange position. ln the low range position, a gear reduction occurs through the plane-tary gear, and in the high range position the gear ratio is 1 : 1 through the planetary gean Document WO2016/053171 A1 discloses a hybrid powertrain, comprising an internalcombustion engine, a first and second electrical machine, a gearbox and a rangegearbox.
SUMMARY Due to different needs of the user of a heavy vehicle, the powertrain of the vehicle of-ten is adapted to the specific need of the user of a heavy vehicle. lf the vehicle isused as a commercial transport vehicle on roads, such as motorvvays, the gearboxand the powertrain may be adapted drive the vehicle mainly on constant and highspeeds. lf the vehicle is used as a commercial vehicle in cities with dense traffic withfrequent brakes and accelerations, the gearbox and the powertrain may be adapted for frequent brakes and accelerations of the vehicle.
Heavy vehicles may under different circumstances and driving conditions need con-siderably torque delivered from propulsion units to drive shafts. However, when thepropulsion units are electrical machines, the powertrain of the vehicle may be pro-vided with a gearbox and a range gearbox, which considerably gears up the torquefrom the electric machine to the drive shafts. ln order to prevent loss of speed andpower of heavy vehicles, shifting such gearbox and a range gearbox should be per-formed without interruption of torque at any driving and shifting situation, such as dur- ing acceleration and braking in both driving and reverse direction.
Heavy vehicles may also under different circumstances and driving conditions need a large number of gears in order to adapt the vehicle to different driving conditions.
Vehicles with hybrid powertrains and all-electric vehicles may require power forPower Take Offs (PTO) or auxiliary components, such as air compressors or climatesystems. Depending on the users need, such vehicles may comprise electrical ma-chines for propulsion of the vehicle and also configured for providing required unin-terrupted power to power consumers, such as power take offs (PTO) and auxiliarycomponents. Such vehicles may also comprise a gearbox and a powertrain adapted for the users need.
Therefore, it is desired to develop a transmission for a vehicle, which is adapted todrive the vehicle on constant and high speeds, which is adapted for frequent brakesand accelerations of the vehicle, which comprises a large number of gear steps,which may be shifted without interruption of torque, and which during shifting is able to deliver uninterrupted power to power Consumers, such as power take offs and aux- iliary components.
An object of the invention is therefore to develop a transmission for a vehicle, whichis adapted drive the vehicle on constant and high speeds.
A further object of the invention is to develop a transmission for a vehicle, which is adapted for frequent brakes and accelerations of the vehicle.
A further object of the invention is to develop a transmission for a vehicle, which com-prises a large number of gear steps.
A further object of the invention is to develop a transmission for a vehicle, which maybe shifted without interruption of torque.
A further object of the invention is to develop a transmission for a vehicle, which dur-ing shifting is able to deliver uninterrupted power to power consumers, such as powertake offs and auxiliary components.
The herein mentioned objects are achieved with a transmission for a vehicle, a vehi-cle, a method performed by a control device for shifting gears in a transmission for avehicle, a computer program and a computer-readable ntediunt according to the ap-pended claims.
According to an aspect of the invention, a transmission for a vehicle is provided. Thetransmission comprising: a first main shaft and a second main shaft, wherein the firstmain shaft is configured to be connected to a first propulsion unit and the secondmain shaft is configured to be connected to a second propulsion unit; an output shaft;a lay shaft connected to the first main shaft, the second main shaft and the outputshaft; a first gear pair connected to the first main shaft and connectable to the layshaft by a first coupling element; a second gear pair connected to the second mainshaft and connectable to the lay shaft by a second coupling element; a third gear pairconnected to the lay shaft and to the output shaft; and a range gearbox comprising: aplanetary gear comprising a sun wheel connected to the output shaft; a ring wheel connectable to a transmission housing; and at least one planet wheel and a planetwheel carrier configured to be connected to drive wheels of the vehicle; wherein thetransmission comprises a fourth gear pair connected to the first gear pair and con-nectable to the planet wheel carrier.
Such transmission for a vehicle is adapted for driving the vehicle on constant andhigh speeds. Such transmission is also adapted for frequent brakes and accelera-tions of the vehicle. The transmission may comprise a large number of gear steps,which is shifted without interruption of torque. This will realize modular performancesteps of a dedicated dual propulsion unit transmission to create several vehicle prop-erties for different needs. The transmission includes a powershift functionality of therange gearbox for a dual propulsion unit configuration. With powershift the shifting ofgears is performed without interruption of torque through the transmission. The pow-ershift functionality also adds additional gears to the transmission. Torque is nottransmitted over gear tooth flanks at high range gear in the range gearbox, which re- sults in increased robustness and simplifies the design of the planetary gear.
According to a further aspect of the invention, a vehicle is provided. The vehicle,comprising the transmission disclosed herein.
Such vehicle is adapted for driving on constant and high speeds. The vehicle is alsoadapted for frequent brakes and accelerations. The transmission in the vehicle maycomprise a large number of gear steps, which may be shifted without interruption oftorque. This will realize modular performance steps of a dedicated dual propulsionunit transmission to create several vehicle properties for different needs.
According to a further aspect of the invention, a method, performed by a control de-vice, for shifting gears in a transmission for a vehicle is provided. The transmissioncomprises a first main shaft and a second main shaft, wherein the first main shaft isconfigured to be connected to a first propulsion unit and the second main shaft isconfigured to be connected to a second propulsion unit; an output shaft; a lay shaftconnected to the first main shaft, the second main shaft and the output shaft; a first gear pair connected to the first main shaft and connectable to the lay shaft by a first coupling element; a second gear pair connected to the second main shaft and con-nectable to the lay shaft by a second coupling element; a third gear pair connected tothe lay shaft and to the output shaft; and a range gearbox comprising: a planetarygear comprising a sun wheel connected to the output shaft; a ring wheel connectableto a transmission housing; and at least one planet wheel and a planet wheel carrierconfigured to be connected to drive wheels of the vehicle; wherein the transmissioncomprises a fourth gear pair connected to the first gear pair and connectable to theplanet wheel carrier; the method comprises the steps of: synchronizing the rotationalspeed of the planet wheel carrier and a fourth gear wheel of the fourth gear pair; con-necting the seventh gear wheel of the fourth gear pair to the planet wheel carrier; dis-connecting the ring wheel from the transmission housing; synchronizing the rotationalspeed of the sun wheel and the planet wheel carrier; and connecting the sun wheeland the planet wheel carrier.
Such method, performed by a control device, for shifting gears in a transmission for avehicle is adapted for driving the vehicle on constant and high speeds. The methodresults in that a large number of gear steps are achieved, which shifting may be per-formed without interruption of torque. This will realize modular performance steps ofa dedicated dual propulsion unit transmission to create several vehicle properties fordifferent needs. The method includes a powershift functionality of the range gearboxfor a dual propulsion unit configuration. With powershift the shifting of gears is per-formed without interruption of torque through the transmission. The powershift func-tionality also adds additional gears to the transmission. Torque is not transmittedover gear tooth flanks at high range gear in the range gearbox, which results in in-creased robustness and simplifies the design of the planetary gear.
Additional objectives, advantages and novel features of the invention will be apparentto one skilled in the art from the following details, and through exercising the invention.While the invention is described below, it should be apparent that the invention maynot be limited to the specifically described details. One skilled in the art, having accessto the teachings herein, will recognize additional applications, modifications and incor- porations in other areas, which are within the scope of the invention.
BRIEF DESCRIPTION OF THE DRAWINGS For fuller understanding of the present disclosure and further objects and advantagesof it, the detailed description set out below should be read together with the accompa-nying drawings, in which the same reference notations denote similar items in the var- ious figures, and in which: Fig. 1 schematically illustrates a side view of a vehicle with a transmission according to an example; Fig. 2 schematically illustrates a view from above of a vehicle with a transmission ac- cording to an example; Figures 3 - 6 schematically illustrate transmissions according to different examples; Fig. 7 illustrates a flow chart of a method according to an example; and Fig. 8 schematically illustrates a control device or computer according to an example.
DETAILED DESCRIPTION According to the present disclosure, a transmission for a vehicle is provided. Thetransmission comprising: a first main shaft and a second main shaft, wherein the firstmain shaft is configured to be connected to a first propulsion unit and the secondmain shaft is configured to be connected to a second propulsion unit; an output shaft;a lay shaft connected to the first main shaft, the second main shaft and the outputshaft; a first gear pair connected to the first main shaft and connectable to the layshaft by a first coupling element; a second gear pair connected to the second mainshaft and connectable to the lay shaft by a second coupling element; a third gear pairconnected to the lay shaft and to the output shaft; and a range gearbox comprising: aplanetary gear comprising a sun wheel connected to the output shaft; a ring wheelconnectable to a transmission housing; and at least one planet wheel and a planetwheel carrier configured to be connected to drive wheels of the vehicle; wherein thetransmission comprises a fourth gear pair connected to the first gear pair and con-nectable to the planet wheel carrier.
The transmission for the vehicle comprises gearvvheels, which are joined to gear-wheel pairs with a fixed ratio. The transmission is adapted to transfer rotationa|speed and torque via the gearvvheels. The first main shaft and the second main shaftmay be arranged coaxial or in parallel with each other. The shafts may transfer rota-tiona| speed and torque to the gearvvheels in the transmission. The shafts may be ro-tatably arranged in the transmission with bearings. A lubricant may be arranged inthe transmission for reducing wear of shafts, gearvvheels and bearings in the trans-mission. The first propulsion unit and the second propulsion unit are connected to therespective first and second main shaft. The first and second propulsion units may beof the same type or of different types. One of the first and second propulsion unitsmay be an electrical machine provided with electric power from an energy storageunit, such as an electric battery. The other one of the first and second propulsionunits may be an internal combustion engine provided with fuel from a fuel tank.
The output shaft may transfer rotationa| speed and torque to from the transmissiondirectly to drive wheels of the vehicle or via gears in the transmission. The lay shafttransfer rotationa| speed and torque from the main shafts to the output shaft or in theopposite direction. The first gear pair comprises two gearvvheels. A first geanNheel isconnected to the first main shaft and a second gearvvheel is connectable to the layshaft. The first coupling element is adapted to connect the second gearvvheel of thefirst gear pair to the lay shaft. The first coupling element may comprise splines-equipped sections adapted on the second gearvvheel and the lay shaft, which sec-tions interact with a first displaceable sleeve, which engages mechanically with thesplines-equipped sections of the second gearvvheel and the lay shaft. ln the releasedstate, a relative rotation may occur between the second gearvvheel and the lay shaft.The first coupling element may alternatively comprise a friction clutch. The secondgear pair comprises two gearvvheels. A third gearvvheel is connected to the secondmain shaft and a fourth gearvvheel is connectable to the lay shaft. The second cou-pling element is adapted to connect the fourth gearvvheel of the second gear pair tothe lay shaft. The second coupling element may comprise splines-equipped sectionsadapted on the fourth gearvvheel and the lay shaft, which sections interact with a sec-ond displaceable sleeve, which engages mechanically with the splines-equipped sec-tions of the fourth gearvvheel and the lay shaft. ln the released state, a relative rota-tion may occur between the fourth gearvvheel and the lay shaft. The second couplingelement may alternatively comprise a friction clutch. The third gear pair comprises two gean/vheels. A fifth geanNheel is connected to the lay shaft and a sixth geanNheelis connected to the output shaft. ln order to gear up the torque and thus increase the torque of the output shaft of thetransmission, the range gearbox is arranged in the transmission. The range gearboxmay be adapted as a planetary gear, but may also be adapted as one or several gearpairs. The range gearbox may be adapted as a planetary gear with a sun wheel, aplanet wheel carrier on which a set of planet wheels or at least one planet wheel ismounted, and a ring wheel. The set of planet wheels interacts with the ring wheel andthe sun wheel. The output shaft of the transmission is connected to the sun wheel.The planet wheel carrier configured to be connected to the drive wheels of the vehi-cle. A propeller shaft may be connected between the planet wheel carrier and thedrive wheels of the vehicle. The transmission housing is a non rotatable component.The transmission housing may be connected to the vehicle. ln order to achieve a lowrange shift through the range gearbox the ring wheel is connectable to a transmissionhousing. The fourth gear pair may comprise a seventh geanNheel, which is rotatablyarranged about the output shaft.
According to an example, the first gear pair and the fourth gear pair have a common gear wheel.
The fourth gear pair may comprise the second gearvvheel of the first gear pair andthe seventh gearwheel. Torque and rotational speed generated by the first electricalmachine, may be transferred directly from the first electrical machine to the planetwheel carrier of the range gearbox via the first, second and seventh gearvvheels.
According to an example, the common gear wheel of the first and fourth gear pair is connectable to and disconectable from the lay shaft.
The second gear wheel is rotatably arranged on the lay shaft. The second gearwheelmay be disconnected from the lay shaft by the first coupling element. Thus, the torqueand rotational speed generated by the first electrical machine, may be transferred di-rectly from the first electrical machine to the planet wheel carrier independently fromany rotational speed and torque of the lay shaft.
According to an example, the fourth gear pair are selectively connectable to the planet wheel carrier by a third coupling element.
The seventh gearvvheel is connectable to the planet wheel carrier by a third couplingelement. The third coupling element is thus adapted to connect the seventh gearvvheelto the planet wheel carrier. The third coupling element may comprise splines-equippedsections adapted on the seventh gearvvheel and the planet wheel carrier, which sec-tions interact with a third displaceable sleeve, which engages mechanically with thesplines-equipped sections of the seventh gearvvheel and the planet wheel carrier. lnthe released state, a relative rotation may occur between the seventh gearvvheel andthe planet wheel carrier. The third coupling element may alternatively comprise a fric-tion clutch.
According to an example, the third coupling element is configured to connect and dis- connect the fourth gear pair to and from the planet wheel carrier by a first actuator.
The third coupling element may comprise splines-equipped sections adapted on theseventh gear\Nheel and the planet wheel carrier, which sections interact with a thirddisplaceable sleeve, which engages mechanically with the splines-equipped sectionsof the seventh gearvvheel and the planet wheel carrier. The third coupling elementmay be axially displaced by the first actuator. The first actuator may be electric,pneumatic or hydraulic controlled. The first actuator may be connected to a first pushand pull rod, which is connected to a first shift fork. The first shift fork may be con-nected to the third coupling element.
According to an example, the output shaft is selectively connectable to the planet wheel carrier by a fourth coupling element.
The output shaft is selectively connectable to the planet wheel carrier by a fourth cou-pling element. The fourth coupling element is thus adapted to connect the output shaftto the planet wheel carrier. The fourth coupling element may comprise splines-equipped sections adapted on the output shaft and the planet wheel carrier, whichsections interact with a fourth displaceable sleeve, which engages mechanically with the splines-equipped sections of the output shaft and the planet wheel carrier. ln thereleased state, a relative rotation may occur between the output shaft and the planet wheel carrier. The third coupling element may alternatively comprise a friction clutch.
According to an example, the fourth coupling element is configured to connect anddisconnect the output shaft to and from the planet wheel carrier by a second actuator.
The fourth coupling element may comprise splines-equipped sections adapted on theoutput shaft and the planet wheel carrier, which sections interact with a fourth dis-placeable sleeve, which engages mechanically with the splines-equipped sections ofthe output shaft and the planet wheel carrier. The fourth coupling element may be ax-ially displaced by the second actuator. The second actuator may be electric, pneu-matic or hydraulic controlled. The second actuator may be connected to a secondpush and pull rod, which is connected to a second shift fork. The second shift forkmay be connected to the fourth coupling element.
According to an example, the ring wheel is selectively connectable to the transmissionhousing by a fifth coupling element.
The ring wheel is selectively connectable to the transmission housing by the fifth cou-pling element. The fifth coupling element is thus adapted to connect the ring wheel tothe transmission housing. The fifth coupling element may comprise splines-equippedsections adapted on the ring wheel and the transmission housing, which sections in-teract with a fifth displaceable sleeve, which engages mechanically with the splines-equipped sections of the ring wheel and the transmission housing. ln the releasedstate, a relative rotation may occur between the ring wheel and the transmission hous-ing. The fifth coupling element may alternatively comprise a friction clutch.
According to an example, the fifth coupling element is configured to connect and dis-connect the ring wheel to and from the transmission housing by a third actuator.
The fifth coupling element may comprise splines-equipped sections adapted on thering wheel and the transmission housing, which sections interact with a fifth displace- able sleeve, which engages mechanically with the splines-equipped sections of the 11 ring wheel and the transmission housing. The fifth coupling element may be axiallydisplaced by the third actuator. The third actuator may be electric, pneumatic or hy-draulic controlled. The third actuator may be connected to a third push and pull rod,which is connected to a third shift fork. The third shift fork may be connected to thefifth coupling element.
According to an example, the fifth coupling element is configured to connect and dis- connect the ring wheel to and from the transmission housing by the second actuator.
Alternatively, the second actuator, which is adapted to axially displace the fourth cou-pling element, may also axially displace the fifth coupling element. The second actuatoris connected to the second push and pull rod, which is connected to the second shiftfork. The second shift fork is connected to the fourth coupling element. The third shiftfork, which is connected to the fifth coupling element, may also be connected to thesecond push and pull rod. The fourth and fifth coupling elements may be displacedsimultaneously by the by the second actuator. Thus, the total number of componentsmay be reduced since only one actuator is necessary to displace fourth and fifth cou-pling elements.
According to an example, the planet wheel carrier is configured to be selectively con-nectable to the drive wheels of the vehicle by a sixth coupling element.
The planet wheel carrier is selectively connectable to the drive wheels by the sixthcoupling element. The sixth coupling element is thus adapted to connect the planetwheel carrier to the drive wheels. The sixth coupling element may comprise splines-equipped sections adapted on the planet wheel carrier and a propeller shaft compo-nent connected to the drive wheels, which sections interact with a sixth displaceablesleeve, which engages mechanically with the splines-equipped sections of the planetwheel carrier and the propeller shaft component. ln the released state, a relative rota-tion may occur between the planet wheel carrier and the drive wheels. The sixth cou-pling element may alternatively comprise a friction clutch.
According to an example, the sixth coupling element is configured to connect and dis-connect the planet wheel carrier to and from the drive wheels by a fourth actuator. 12 The sixth coupling element may comprise splines-equipped sections adapted on theplanet wheel carrier and a propeller shaft component connected to the drive wheels,which sections interact with a sixth displaceable sleeve, which engages mechanicallywith the splines-equipped sections of the planet wheel carrier and the propeller shaftcomponent. The sixth coupling element may be axially displaced by the fourth actua-tor. The fourth actuator may be electric, pneumatic or hydraulic controlled. The fourthactuator may be connected to a fourth push and pull rod, which is connected to afourth shift fork. The fourth shift fork may be connected to the sixth coupling element.
According to an example, the ring wheel is configured to be selectively connectable tothe drive wheels by the sixth coupling element.
The ring wheel is selectively connectable to the drive wheels by the sixth couplingelement. The sixth coupling element is thus adapted to connect the ring wheel to thedrive wheels. The sixth coupling element may comprise splines-equipped sectionsadapted on the ring wheel and a propeller shaft component connected to the drivewheels, which sections interact with a sixth displaceable sleeve, which engages me-chanically with the splines-equipped sections of the ring wheel and the propeller shaftcomponent. ln the released state, a relative rotation may occur between the ring wheeland the drive wheels.
According to an example, a first power consumer is connected to the first main shaftand a second power consumer is connected to the second main shaft.
During shifting, the transmission is able to deliver uninterrupted power to power con-sumers, such as power take offs and auxiliary components. The first and second power consumers may be disconnectable from the respective main shaft.
According to an example, the first propulsion unit is a first electrical machine and the second propulsion unit is a second electrical machine. 13 The first and second electrical machines may be of the same type or of different types.The first and second main shafts may be connected by a connection element so the power from both electrical machines may be used simultaneously.
According to the present disclosure, a vehicle is provided. The vehicle, comprisingthe transmission disclosed herein. Such vehicle is adapted for driving on constantand high speeds. The vehicle is also adapted for frequent brakes and accelerations.The transmission in the vehicle may comprise a large number of gear steps, whichmay be shifted without interruption of torque. This will realize modular performancesteps of a dedicated dual propulsion unit transmission to create several vehicle prop-erties for different needs.
According to the present disclosure, a method, performed by a control device, forshifting gears in a transmission for a vehicle is provided. The transmission comprisesa first main shaft and a second main shaft, wherein the first main shaft is configuredto be connected to a first propulsion unit and the second main shaft is configured tobe connected to a second propulsion unit; an output shaft; a lay shaft connected tothe first main shaft, the second main shaft and the output shaft; a first gear pair con-nected to the first main shaft and connectable to the lay shaft by a first coupling ele-ment; a second gear pair connected to the second main shaft and connectable to thelay shaft by a second coupling element; a third gear pair connected to the lay shaftand to the output shaft; and a range gearbox comprising: a planetary gear comprisinga sun wheel connected to the output shaft; a ring wheel connectable to a transmis-sion housing; and at least one planet wheel and a planet wheel carrier configured tobe connected to drive wheels of the vehicle; wherein the transmission comprises afourth gear pair connected to the first gear pair and connectable to the planet wheelcarrier; the method comprises the steps of: synchronizing the rotational speed of theplanet wheel carrier and a seventh gear wheel of the fourth gear pair; connecting theseventh gear wheel of the fourth gear pair to the planet wheel carrier; disconnectingthe ring wheel from the transmission housing; synchronizing the rotational speed ofthe sun wheel and the planet wheel carrier; and connecting the sun wheel and the planet wheel carrier. 14 The method steps will shift gears in the range box from a low range position to a highrange position. The first method step starts when the range box is in low range posi- tion.
The transmission comprises gearwheels, which are joined to gearvvheel pairs with afixed ratio. The transmission is adapted to transfer rotational speed and torque viathe gearvvheels. The first main shaft and the second main shaft may be arranged co-axial or in parallel with each other. The shafts may transfer rotational speed andtorque to the gearwheels in the transmission. The shafts may be rotatably arrangedin the transmission with bearings. A lubricant may be arranged in the transmission forreducing wear of shafts, gearvvheels and bearings in the transmission. The first pro-pulsion unit and the second propulsion unit are connected to the respective first andsecond main shaft. The first and second propulsion units may be of the same type orof different types. One of the first and second propulsion units may be an electricalmachine provided with electric power from an energy storage unit, such as an electricbattery. The other one of the first and second propulsion units may be an internalcombustion engine provided with fuel from a fuel tank. The output shaft may transferrotational speed and torque to from the transmission directly to drive wheels of thevehicle or via gears in the transmission. The lay shaft transfer rotational speed andtorque from the main shafts to the output shaft or in the opposite direction. The firstgear pair comprises two gearwheels. A first gearvvheel is connected to the first mainshaft and a second gearwheel is connectable to the lay shaft. The first coupling ele-ment is adapted to connect the second gearwheel of the first gear pair to the layshaft. The first coupling element may comprise splines-equipped sections adapted onthe second gearwheel and the lay shaft, which sections interact with a first displacea-ble sleeve, which engages mechanically with the splines-equipped sections of thesecond gearwheel and the lay shaft. ln the released state, a relative rotation may oc-cur between the second gearvvheel and the lay shaft. The first coupling element mayalternatively comprise a friction clutch. The second gear pair comprises two gear-wheels. A third gearvvheel is connected to the second main shaft and a fourth gear-wheel is connectable to the lay shaft. The second coupling element is adapted toconnect the fourth gearwheel of the second gear pair to the lay shaft. The secondcoupling element may comprise splines-equipped sections adapted on the fourthgearwheel and the lay shaft, which sections interact with a second displaceable sleeve, which engages mechanically with the splines-equipped sections of the fourthgearvvheel and the lay shaft. ln the released state, a relative rotation may occur be-tvveen the fourth gearvvheel and the lay shaft. The second coupling element may al-ternatively comprise a friction clutch. The third gear pair comprises two gear\Nheels.A fifth gearvvheel is connected to the lay shaft and a sixth gean/vheel is connected tothe output shaft. ln order to gear up the torque and thus increase the torque of the output shaft of thetransmission, the range gearbox is arranged in the transmission. The range gearboxmay be adapted as a planetary gear, but may also be adapted as one or several gearpairs. The range gearbox may be adapted as a planetary gear with a sun wheel, aplanet wheel carrier on which a set of planet wheels or at least one planet wheel ismounted, and a ring wheel. The set of planet wheels interacts with the ring wheel andthe sun wheel. The output shaft of the transmission is connected to the sun wheel.The planet wheel carrier configured to be connected to the drive wheels of the vehi-cle. A propeller shaft may be connected between the planet wheel carrier and thedrive wheels of the vehicle. The transmission housing is a non rotatable component.The transmission housing may be connected to the vehicle. ln order to achieve a lowrange shift through the range gearbox the ring wheel is connectable to a transmissionhousing. The fourth gear pair may comprise a seventh gear\Nheel, which is rotatablyarranged about the output shaft.
The method step of synchronizing the rotational speed of the planet wheel carrierand a seventh gear wheel of the fourth gear pair may comprise to increase or de-crease the rotational speed of the planet wheel carrier to the same rotational speedof the seventh gear wheel of the fourth gear pair. Alternatively, or in combination, thismethod step may comprise increase or decrease the rotational speed of the seventh gear wheel to the same rotational speed of the planet wheel carrier.
The method step of connecting the seventh gear wheel of the fourth gear pair to theplanet wheel carrier results in that the seventh gear wheel and the planet wheel car- rier will rotate with the same speed. 16 The method step of disconnecting the ring wheel from the transmission housing re-sults in that the ring wheel is free to rotate from the transmission housing. Before dis-connecting the ring wheel from the transmission housing torque balance between thering wheel and the transmission housing should be created. ln order to disconnectthe ring wheel from the transmission housing, the first and/or second propulsion unitis controlled in such a way that torque balance is achieved between the ring wheeland the transmission housing. When torque balance has been achieved, the ringwheel is disconnected from the transmission housing, so that the the ring wheel andthe transmission housing are no longer mechanically connected with each other.
Torque balance relates to a state where a torque acts on the ring wheel arranged inthe planetary gear, representing the product of the torque acting on the planetarywheel carrier of the planetary gear and the gear ratio of the planetary gear, while sim-ultaneously a torque acts on the planetary gear's sun wheel, representing the productof the torque acting on the planetary wheel carrier and (1- the planetary gear's gearratio). ln the event two of the planetary gear's component parts, i.e. the sun wheel,the internal ring gear or planetary wheel carrier, are connected with the use of aclutch device, this clutch device does not transfer any torque between the planetarygear's parts when torque balance prevails. Accordingly, the clutch device may easily be shifted and the planetary gear's component parts may be disconnected.
The method step of synchronizing the rotational speed of the sun wheel and theplanet wheel carrier may comprise to increase or decrease the rotational speed ofthe sun wheel to the same rotational speed of the planet wheel carrier. Alternatively,or in combination, this method step may comprise increase or decrease the rotationalspeed of the planet wheel carrier to the same rotational speed of the sun wheel.
The method step of connecting the sun wheel and the planet wheel carrier results inthat sun wheel and the planet wheel carrier will rotate with the same speed.
According to an example, the step of synchronizing the rotational speed of the planetwheel carrier and a seventh gear wheel of the fourth gear pair comprising synchroniz-ing the rotational speed of the planet wheel carrier and a seventh gear wheel of thefourth gear pair by means of the first propulsion unit. 17 The rotational speed of the planet wheel carrier is determined by the rotational speedof the drive wheels and thus by the speed of the vehicle. By increasing or decreasingthe speed of the first propulsion unit, depending on the respective rotational speeds ofthe seventh gear wheel and the planet wheel carrier, the rotational speed of the planetwheel carrier and a seventh gear wheel may be synchronized. The rotational speed ofthe first propulsion unit is transferred to the seventh gear wheel via the first and second gear wheels.
According to an example, the step of connecting the seventh gear wheel of the fourthgear pair to the planet wheel carrier comprising connecting the seventh gear wheel of the fourth gear pair to the planet wheel carrier by means of a third coupling element.
The seventh gearwheel is connectable to the planet wheel carrier by a third couplingelement. The third coupling element is thus adapted to connect the seventh gearvvheelto the planet wheel carrier. The third coupling element may comprise splines-equippedsections adapted on the seventh gearwheel and the planet wheel carrier, which sec-tions interact with a third displaceable sleeve, which engages mechanically with thesplines-equipped sections of the seventh gearvvheel and the planet wheel carrier. lnthe released state, a relative rotation may occur between the seventh gearvvheel andthe planet wheel carrier. The third coupling element may alternatively comprise a fric-tion clutch. The third coupling element is configured to connect and disconnect thefourth gear pair to and from the planet wheel carrier by a first actuator. The third cou-pling element may comprise splines-equipped sections adapted on the seventh gear-wheel and the planet wheel carrier, which sections interact with a third displaceablesleeve, which engages mechanically with the splines-equipped sections of the seventhgeanNheel and the planet wheel carrier. The third coupling element may be axiallydisplaced by the first actuator. The first actuator may be electric, pneumatic or hydrau-lic controlled. The first actuator may be connected to a first push and pull rod, which isconnected to a first shift fork. The first shift fork may be connected to the third coupling element. 18 According to an example, the step of disconnecting the ring wheel from the transmis-sion housing, comprises disconnecting the ring wheel from the transmission housing by controlling a fifth coupling element.
The ring wheel is selectively connectabie to the transmission housing by the fifth cou-pling element. The fifth coupling element is thus adapted to connect the ring wheel tothe transmission housing. The fifth coupling element may comprise splines-equippedsections adapted on the ring wheel and the transmission housing, which sections in-teract with a fifth displaceable sleeve, which engages mechanically with the splines-equipped sections of the ring wheel and the transmission housing. ln the releasedstate, a relative rotation may occur between the ring wheel and the transmission hous-ing. The fifth coupling element may alternatively comprise a friction clutch. The fifthcoupling element is configured to connect and disconnect the ring wheel to and fromthe transmission housing by a third actuator. The fifth coupling element may comprisesplines-equipped sections adapted on the ring wheel and the transmission housing,which sections interact with a fifth displaceable sleeve, which engages mechanicallywith the splines-equipped sections of the ring wheel and the transmission housing. Thefifth coupling element may be axially displaced by the third actuator. The third actuatormay be electric, pneumatic or hydraulic controlled. The third actuator may be con-nected to a third push and pull rod, which is connected to a third shift fork. The thirdshift fork may be connected to the fifth coupling element.
According to an example, the step of synchronizing the rotational speed of the sunwheel and the planet wheel carrier comprising synchronizing the rotational speed ofthe sun wheel and the planet wheel carrier by means of the second propulsion unit.
The rotational speed of the planet wheel carrier is determined by the rotational speedof the drive wheels and thus by the speed of the vehicle. By increasing or decreasingthe speed of the second propulsion unit, depending on the respective rotational speedsof the sun wheel and the planet wheel carrier, the rotational speed of the planet wheelcarrier and the sun wheel may be synchronized. The rotational speed of the second propulsion unit is transferred to the sun wheel via the second and third gear pairs. 19 According to an example, the step of connecting the sun wheel and the planet wheelcarrier comprises connecting the sun wheel and the planet wheel carrier by means of a fourth coupling element.
The sun wheel is connected to the output shaft of the transmission. The sun wheel,and thus the output shaft is selectively connectable to the planet wheel carrier by afourth coupling element. The fourth coupling element is thus adapted to connect theoutput shaft to the planet wheel carrier. The fourth coupling element may comprisesplines-equipped sections adapted on the output shaft and the planet wheel carrier,which sections interact with a fourth displaceable sleeve, which engages mechanicallywith the splines-equipped sections of the output shaft and the planet wheel carrier. lnthe released state, a relative rotation may occur between the output shaft and theplanet wheel carrier. The third coupling element may alternatively comprise a frictionclutch. The fourth coupling element is configured to connect and disconnect the outputshaft to and from the planet wheel carrier by a second actuator. The fourth couplingelement may comprise splines-equipped sections adapted on the output shaft and theplanet wheel carrier, which sections interact with a fourth displaceable sleeve, whichengages mechanically with the splines-equipped sections of the output shaft and theplanet wheel carrier. The fourth coupling element may be axially displaced by the sec-ond actuator. The second actuator may be electric, pneumatic or hydraulic controlled.The second actuator may be connected to a second push and pull rod, which is con-nected to a second shift fork. The second shift fork may be connected to the fourth coupling element.
The present disclosure also relates to a computer program comprising instructionswhich, when the program is executed by a computer, causes the computer to carry outthe method disclosed above. The disclosure further relates to a computer-readablemedium comprising instructions, which when executed by a computer causes the com- puter to carry out the method disclosed above.
The present disclosure will now, according to an example, be further illustrated with reference to the appended figures.
Fig. 1 schematically illustrates a side view of a vehicle 1 with a transmission 2 ac-cording to an example. The transmission 2 is arranged in a powertrain 3 comprisingfirst and second propulsion units 4, 6. The transmission 2 is connected to the propul-sion units 4, 6 and a propeller shaft 8, which is connected to drive shafts 10 of a rearaxle 12. The drive shafts 10 are connected to the propeller shaft 8, so that the propel-ler shaft 8 extends between the transmission 2 and the drive shafts 10. The propul-sion units 4, 6 are arranged in a position between the transmission 2 and the rearaxle 12 in a longitudinal direction of the vehicle 1. An energy storage unit 14 is ar-ranged in front of the powertrain 3. The energy storage unit 14 is connected to thepropulsion units 4, 6 and deliver power to the propulsion unit 4. The propulsion units4, 6 are arranged in series. ln case the propulsion units 4, 6 are electrical machines,the may deliver electric power to the energy storage unit 14. ln case the propulsionunits 4, 6 are electrical machines, the may deliver electric power to each other. Firstand second power consumers 20, 22 are connected to the transmission 2. The vehi-cle 1 comprises rear drive wheels 16 and front wheels 18. The front wheels 18 may be steerable.
Fig. 2 schematically illustrates a view from above of a vehicle 1 with a transmission 2according to an example. The two propulsion units 4, 6 are arranged in series in thepowertrain 3. The propulsion units 4, 6 may be first and second electrical machines 4,6, which together or individually provide torque and power for propelling the vehicle 1.The propulsion units 4, 6 and the propeller shaft 8 are connected in parallel to thetransmission 2. The axial extension of the power train 2 in the longitudinal direction ofthe vehicle 1, from the connection between the propeller shaft 8 and the drive shaft 10,corresponds to the common axial extension of the propeller shaft 8 and the transmis-sion 2 in the longitudinal direction of the vehicle 1. The transmission 2 is accommo-dated in a transmission housing 64.
Figures 3 - 6 schematically illustrate transmissions 2 according to different examples.The transmission 2 comprising a first main shaft 24 and a second main shaft 26. Thefirst main shaft 24 is configured to be connected to a first propulsion unit 4 and thesecond main shaft 26 is configured to be connected to a second propulsion unit 6.The first and second main shafts 24, 26 may be connected to each other by coupling 21 device 25. By connecting the first and second main shafts 24, 26 by the coupling de-vice 2 torque from both propulsion units 4, 6 may be used as input to the transmis-sion 2. An output shaft 28 is provided. A lay shaft 32 is connected to the first mainshaft 24, the second main shaft 26 and the output shaft 28. A first gear pair G1 areconnected to the first main shaft 24 and connectabie to the lay shaft 32 by a first cou-pling element S1. A second gear pair G2 are connected to the second main shaft 26and are connectabie to the lay shaft 32 by a second coupling element S2. A thirdgear pair G3 are connected to the lay shaft 32 and to the output shaft 28. A rangegearbox 34 comprising a pianetary gear 36. The pianetary gear 36 comprising a sunwheel 38 connected to the output shaft 28; a ring wheel 40 connectabie to a trans-mission housing 64; and at least one planet wheel 42 and a planet wheel carrier 46configured to be connected to drive wheels 16 of the vehicle 1 (fig. 1). The transmis-sion 2 comprises a fourth gear pair G4 connected to the first gear pair G1 and con- nectabie to the planet wheel carrier 46.
The first main shaft 24 and the second main shaft 26 are arranged coaxial to eachother. The shafts 24, 26 transfer rotational speed and torque to the gearwheels in thetransmission 2. The shafts 24, 26 are rotatably arranged in the transmission 2. Thefirst propulsion unit 4 and the second propulsion unit 6 are connected to the respec-tive first and second main shaft 24, 26. The first and second propulsion units 4, 6 areelectrical machines 4, 6 provided with electric power from the energy storage unit 14(fig. 1 and 2).
The lay shaft 32 transfers rotational speed and torque from the main shafts 24, 26 tothe output shaft 28. Rotational speed and torque may also be transferred from theoutput shaft 28 to the main shafts 24, 26. The first gear pair G1 comprises two gear-wheels. A first gearvvheel 48 is connected to the first main shaft 24 and a secondgearwheel 50 is connectabie to the lay shaft 32. The first coupling element S1 isadapted to connect the second gearvvheel 50 of the first gear pair G1 to the lay shaft32. The first coupling element S1 may comprise splines-equipped sections adaptedon the second gearwheel 50 and the lay shaft 32, which sections interact with a firstdisplaceable sleeve 52, which engages mechanically with the splines-equipped sec-tions of the second gearwheel 50 and the lay shaft 32. ln the released state, a rela-tive rotation may occur between the second gearwheel 50 and the lay shaft 32. The 22 second gear pair G2 comprises two gearvvheels. A third gearwheel 54 is connectedto the second main shaft 26 and a fourth gearvvheel 56 is connectable to the lay shaft32. The second coupling element S2 is adapted to connect the fourth gearvvheel 56of the second gear pair G2 to the lay shaft 32. The second coupling element S2 maycomprise splines-equipped sections adapted on the fourth gearwheel 56 and the layshaft 32, which sections interact with a second displaceable sleeve 58, which en-gages mechanically with the splines-equipped sections of the fourth gearvvheel 56and the lay shaft 32. The third gear pair G3 comprises two gearvvheels. A fifth gear-wheel 60 is connected to the lay shaft 32 and a sixth gearvvheel 62 is connected tothe output shaft 28.
The range gearbox 34 comprises the planetary gear 36 with the sun wheel 38, theplanet wheel carrier 46 on which the planet wheels 42 are mounted, and a ring wheel40. The planet wheels 42 interacts with the ring wheel 40 and the sun wheel 38. Theoutput shaft 28 of the transmission 2 is connected to the sun wheel 38. The planetwheel carrier 46 is configured to be connected to the drive wheels 16 of the vehicle 1.The propeller shaft 8 is connected between the planet wheel carrier 46 and the drivewheels 16 of the vehicle 1 _ The transmission housing 64 is a non rotatable component.The transmission housing 64 is connected to the vehicle 1. ln order to achieve a lowrange shift through the range gearbox 34 the ring wheel 40 is connectable to the trans-mission housing 64. The fourth gear pair G4 comprises a seventh gearvvheel 66, whichis rotatably arranged about the output shaft 28.
The first gear pair G1 and the fourth gear pair G4 have a common gearvvheel. Thefourth gear pair G4 may comprise the second gearvvheel 50 of the first gear pair G1and the seventh gean/vheel 66. Torque and rotational speed generated by the firstelectrical machine 4, may be transferred directly from the first electrical machine 4 tothe planet wheel carrier 46 of the range gearbox 34 via the first, second and seventhgearvvheels 48, 50, 66.
The common gearwheel of the first and fourth gear pair G1, G4 is connectable to anddisconectable from the lay shaft 32. The second gearvvheel 50 is rotatably arrangedon the lay shaft 32. The second gearwheel 50 may be disconnected from the lay shaft32 by the first coupling element S1. Thus, the torque and rotational speed generated 23 by the first electrical machine 4, may be transferred directly from the first electricalmachine 4 to the planet wheel carrier 46 independently from any rotational speed andtorque of the lay shaft 32.
The fourth gear pair G4 are selectively connectable to the planet wheel carrier 46 by athird coupling element S3. The seventh gearwheel 66 is connectable to the planetwheel carrier 46 by a third coupling element S3. The third coupling element S3 is thusadapted to connect the seventh gearwheel 66 to the planet wheel carrier 46. The thirdcoupling element S3 may comprise splines-equipped sections adapted on the seventhgeanNheel 66 and the planet wheel carrier 46, which sections interact with a third dis-placeable sleeve 68, which engages mechanically with the splines-equipped sections of the seventh gearvvheel 66 and the planet wheel carrier 46.
The third coupling element S3 is configured to connect and disconnect the fourthgear pair G4 to and from the planet wheel carrier 46 by a first actuator A1. The thirdcoupling element S3 may comprise splines-equipped sections adapted on the sev-enth geanNheel 66 and the planet wheel carrier 46, which sections interact with athird displaceable sleeve 68, which engages mechanically with the splines-equippedsections of the seventh gearwheel 66 and the planet wheel carrier 46. The third cou-pling element S3 may be axially displaced by the first actuator A1. The first actuatorA1 may be electric, pneumatic or hydraulic controlled. The first actuator A1 is con-nected to a first shift rod 70, which is connected to a first shift fork 72. The first shiftfork 72 is connected to the third coupling element S3.
The output shaft 28 is selectively connectable to the planet wheel carrier 46 by a fourthcoupling element S4. The output shaft 28 is selectively connectable to the planet wheelcarrier 46 by a fourth coupling element S4. The fourth coupling element S4 is thusadapted to connect the output shaft 28 to the planet wheel carrier 46. The fourth cou-pling element S4 may comprise splines-equipped sections adapted on the output shaft28 and the planet wheel carrier 46, which sections interact with a fourth displaceablesleeve 74, which engages mechanically with the splines-equipped sections of the out- put shaft 28 and the planet wheel carrier 46. 24 The fourth coupling element S4 is configured to connect and disconnect the outputshaft 28 to and from the planet wheel carrier 46 by a second actuator A2. The fourthcoupling element S4 may comprise splines-equipped sections adapted on the outputshaft 28 and the planet wheel carrier 46, which sections interact with a fourth displace-able sleeve 74, which engages mechanically with the splines-equipped sections of theoutput shaft 28 and the planet wheel carrier 46. The fourth coupling element S4 isconfigured to be axially displaced by the second actuator A2. The second actuator A2may be electric, pneumatic or hydraulic controlled. The second actuator A2 is con-nected to a second shift rod 76, which is connected to a second shift fork 78. The second shift fork 78 is connected to the fourth coupling element S4.
The ring wheel 40 is selectively connectable to the transmission housing 64 by a fifthcoupling element S5. The ring wheel 40 is selectively connectable to the transmissionhousing 64 by the fifth coupling element S5. The fifth coupling element S5 is thusadapted to connect the ring wheel 40 to the transmission housing 64. The fifth couplingelement S5 may comprise splines-equipped sections adapted on the ring wheel 40 andthe transmission housing 64, which sections interact with a fifth displaceable sleeve80, which engages mechanically with the splines-equipped sections of the ring wheel40 and the transmission housing 64.
The fifth coupling element S5 is configured to connect and disconnect the ring wheel40 to and from the transmission housing 64 by a third actuator A3. The fifth couplingelement S5 may comprise splines-equipped sections adapted on the ring wheel 40 andthe transmission housing 64, which sections interact with a fifth displaceable sleeve80, which engages mechanically with the splines-equipped sections of the ring wheel40 and the transmission housing 64. The fifth coupling element S5 is configured to beaxially displaced by the third actuator A3. The third actuator A3 may be electric, pneu-matic or hydraulic controlled. The third actuator A3 may be connected to a third shiftrod 82, which is connected to a third shift fork 84. The third shift fork 84 is connectedto the fifth coupling element S5.
According to fig. 4 the second gean/vheel 50 is provided with secondary gearvvheel 50'.The secondary gearvvheel 50' has a reduced diameter comparing to the second gear-wheel 50. The seventh gean/vheel is connected to the secondary gean/vheel 50'. The gear ratio of the fourth gear pair G4 will thus be increased comparing with a situationwhen the seventh gearvvheel is connected to the second gearwheel 50.
According to fig. 5, the fifth coupling element S5 is configured to connect and discon-nect the ring wheel 40 to and from the transmission housing 64 by the second actuatorA2. Alternatively, the second actuatorA2, which is adapted to axially displace the fourthcoupling element S4, may also axially displace the fifth coupling element S5. The sec-ond actuator A2 is connected to the second shift rod 76, which is connected to thesecond shift fork 78. The second shift fork 78 is connected to the fourth coupling ele-ment S4. The third shift fork 84, which is connected to the fifth coupling element S5,may also be connected to the second shift rod 76. The fourth and fifth coupling ele-ments S4, S5 are configured to be displaced simultaneously by the by the secondactuator A2. Thus, the total number of components may be reduced since only oneactuator is necessary to displace fourth and fifth coupling elements S4, S5.
The planet wheel carrier 46 is configured to be selectively connectable to the drivewheels 16 of the vehicle 1 by a sixth coupling element S6. The planet wheel carrier 46is selectively connectable to the drive wheels 16 by the sixth coupling element S6. Thesixth coupling element S6 is thus adapted to connect the planet wheel carrier 46 to thedrive wheels 16. The sixth coupling element S6 may comprise splines-equipped sec-tions adapted on the planet wheel carrier 46 and a propeller shaft 8 component con-nected to the drive wheels 16, which sections interact with a sixth displaceable sleeve86, which engages mechanically with the splines-equipped sections of the planet wheel carrier 46 and the propeller shaft 8 component.
According to fig. 6 the sixth coupling element S6 is configured to connect and discon-nect the planet wheel carrier 46 to and from the drive wheels 16 by a fourth actuatorA4. The sixth coupling element S6 may comprise splines-equipped sections adaptedon the planet wheel carrier 46 and a propeller shaft component 92 connected to thedrive wheels 16, which sections interact with a sixth displaceable sleeve 86, whichengages mechanically with the splines-equipped sections of the planet wheel carrier46 and the propeller shaft component 92. Displacing the sixth displaceable sleeve 86to a position when the sixth displaceable sleeve 86 engages mechanically with splines-equipped sections of the ring wheel 40 and the propeller shaft component 92 will result 26 in a reverse gear. The sixth coupling element S6 may be axially displaced by the fourthactuator A4. The fourth actuator A4 may be electric, pneumatic or hydraulic controlled.The fourth actuator A4 is connected to a fourth shift rod 88, which is connected to afourth shift fork 90. The fourth shift fork 90 is connected to the sixth coupling elementS6. When shifted into the reverse gear, the planet wheel carrier 46 is connected to thetransmission housing 64 by the third coupling element S3.
The ring wheel 40 is configured to be selectively connectable to the drive wheels 16by the sixth coupling element S6. The ring wheel 40 is selectively connectable to thedrive wheels 16 by the sixth coupling element S6. The sixth coupling element S6 isthus adapted to connect the ring wheel 40 to the drive wheels 16. The sixth couplingelement S6 may comprise splines-equipped sections adapted on the ring wheel 40 anda propeller shaft component 92 connected to the drive wheels 16, which sections in-teract with a sixth displaceable sleeve 86, which engages mechanically with thesplines-equipped sections of the ring wheel 40 and the propeller shaft component 92.
A first power consumer 20 is connected to the first main shaft 24 and a second powerconsumer 22 is connected to the second main shaft 26. During shifting, the transmis-sion 2 is able to deliver uninterrupted power to the power consumers 20, 22, such aspower take offs and auxiliary components. The first and second power consumers 20,22 may be disconnectable from the respective main shaft 24, 26.
The transmission 2 may comprise a control device 100 connected to the electrical ma-chines 4, 5, to the actuators A1-A4 and to sensors (not disclosed) determining therotational speed, torque and positions of the different components in the transmission2.
Fig. 7 illustrates a flow chart of a method, performed by a control device 100, forshifting gears in a transmission 2 for a vehicle 1 according to an example. Themethod thus relates to shifting gears in the transmission 2 as disclosed in figures 1 -6. The transmission 2 comprising a first main shaft 24 and a second main shaft 26,wherein the first main shaft 24 is configured to be connected to a first propulsion unit4 and the second main shaft 26 is configured to be connected to a second propulsionunit 6. An output shaft 28 is provided. A lay shaft 32 is connected to the first main 27 shaft 24, the second main shaft 26 and the output shaft 28. A first gear pair G1 areconnected to the first main shaft 24 and connectable to the lay shaft 32 by a first cou-pling element S1. A second gear pair G2 are connected to the second main shaft 26and are connectable to the lay shaft 32 by a second coupling element S2. A thirdgear pair G3 are connected to the lay shaft 32 and to the output shaft 28. A rangegearbox 34 comprising a planetary gear 36. The planetary gear 36 comprising a sunwheel 38 connected to the output shaft 28; a ring wheel 40 connectable to a trans-mission housing 64; and at least one planet wheel 42 and a planet wheel carrier 46configured to be connected to drive wheels 16 of the vehicle 1. The transmission 2comprises a fourth gear pair G4 connected to the first gear pair G1 and connectableto the planet wheel carrier 46.
The method comprises the steps of: synchronizing s101 the rotational speed of theplanet wheel carrier 46 and a seventh gearvvheel 66 of the fourth gear pair G4; con-necting s102 the seventh geanNheel 66 of the fourth gear pair G4 to the planet wheelcarrier 46; disconnecting s103 the ring wheel 40 from the transmission housing 64;synchronizing s104 the rotational speed of the sun wheel 38 and the planet wheelcarrier 46; and connecting the sun wheel 38 and the planet wheel carrier 46.
The method steps is adapted to shift gears in the range gearbox 34 from a low rangeposition to a high range position. The first method step starts when the range gear-box 34 is shifted in low range position.
According to an example, the step of synchronizing s101 the rotational speed of theplanet wheel carrier 46 and a seventh gearwheel 66 of the fourth gear pair G4 com-prising synchronizing the rotational speed of the planet wheel carrier 46 and a seventhgearwheel 66 of the fourth gear pair G4 by means of the first propulsion unit 4.
According to an example, the step of connecting s102 the seventh gearvvheel 66 of thefourth gear pair G4 to the planet wheel carrier 46 comprising connecting s102 the sev-enth geanNheel 66 of the fourth gear pair G4 to the planet wheel carrier 46 by means of a third coupling element S3. 28 According to an example, the step of disconnecting s103 the ring wheel 40 from thetransmission housing 64, comprises disconnecting the ring wheel 40 from the trans- mission housing 64 by controlling a fifth coupling element S5.
According to an example, the step of synchronizing s104 the rotationa| speed of thesun wheel 38 and the planet wheel carrier 46 comprising synchronizing the rotationa|speed of the sun wheel 38 and the planet wheel carrier 46 by means of the second propulsion unit 6.
According to an example, the step of connecting s105 the sun wheel 38 and the planetwheel carrier 46 comprises connecting the sun wheel 38 and the planet wheel carrier 46 by means of a fourth coupling element S4.
Figure 8 is a diagram of a version of a device 500. The control device 100, performingthe method, may in a version comprise the device 500. The device 500 comprises anon-volatile memory 520, a data processing unit 510 and a read/write memory 550.The non-volatile memory 520 has a first memory element 530 in which a computerprogramme, e.g. an operating system, is stored for controlling the function of the device500. The device 500 further comprises a bus controller, a serial communication port,I/O means, an A/D converter, a time and date input and transfer unit, an event counterand an interruption controller (not depicted). The non-volatile memory 520 has also asecond memory element 540.
There is provided a computer programme P which comprises routines for performingthe safety method. The programme P may be stored in an executable form or in acompressed form in a memory 560 and/or in a read/write memory 550.
Where the data processing unit 510 is described as performing a certain function, itmeans that the data processing unit 510 effects a certain part of the programme storedin the memory 560 or a certain part of the programme stored in the read/write memory550. 29 The data processing device 510 can communicate with a data port 599 via a data bus515. The non-volatile memory 520 is intended for communication with the data pro-cessing unit 510 via a data bus 512. The separate memory 560 is intended to com-municate with the data processing unit 510 via a data bus 511. The read/write memory 550 is adapted to communicating with the data processing unit 510 via a data bus 514.
When data are received on the data port 599, they are stored temporarily in the secondmemory element 540. When input data received have been temporarily stored, the data processing unit 510 is prepared to effect code execution as described above.
Parts of the methods herein described may be effected by the device 500 by means ofthe data processing unit 510 which runs the programme stored in the memory 560 orthe read/write memory 550. When the device 500 runs the programme, methods herein described are executed.
The foregoing description of the examples has been furnished for i||ustrative and de-scriptive purposes. lt is not intended to be exhaustive, or to limit the examples to thevariants described. Many modifications and variations will obviously be apparent toone skilled in the art. The examples have been chosen and described in order to bestexplicate principles and practical applications, and to thereby enable one skilled inthe art to understand the examples in terms of its various examples and with the vari-ous modifications that are applicable to its intended use. The components and fea-tures specified above may, within the framework of the examples, be combined be- tvveen different examples specified.

Claims (3)

1. A transmission (2) for a vehicle (1), the transmission (2) comprises: a first main shaft (24) and a second main shaft (26), wherein the first main shaft(24) is configured to be connected to a first propulsion unit (4) and the second mainshaft (26) is configured to be connected to a second propulsion unit (6); an output shaft (28); a Iay shaft (32) connected to the first main shaft (24), the second main shaft(26) and the output shaft (28); a first gear pair (G1) connected to the first main shaft (24) and connectable tothe Iay shaft (32) by a first coupling element (S1 ); a second gear pair (G2) connected to the second main shaft (26) and connect-able to the Iay shaft (32) by a second coupling element (S2); a third gear pair (G3) connected to the Iay shaft (32) and to the output shaft (28);and a range gearbox (34) comprising: a planetary gear (36) comprising a sun wheel (38) connected to the output shaft(28); a ring wheel (40) connectable to a transmission housing (64); and at least one planet wheel (42) and a planet wheel carrier (46) configured to beconnected to drive wheels (16) of the vehicle (1 ); wherein the transmission (2) comprises a fourth gear pair (G4) connected to thefirst gear pair (G1) and connectable to the planet wheel carrier (46) characterized inthat f the first gear pair (G1) and the fourth gear pair (G4) have a common gearwheel. 3
2. The transmission (2) according to claim 21, wherein the common gearvvheel of thefirst and fourth gear pair (G1, G4) is connectable to and disconectable from the Iayshaft (32). |15 4§. The transmission (2) according to any one of the preceding claims, wherein thefourth gear pair (G4) are selectively connectable to the planet wheel carrier (46) by athird coupling element (S3). 54. The transmission (2) according to claim 4§, wherein the third coupling element (S3)is configured to connect and disconnect the fourth gear pair (G4) to and from the planetwheel carrier (46) by a first actuator (A1). 65. The transmission (2) according to any one of the preceding claims, wherein theoutput shaft (28) is selectively connectable to the planet wheel carrier (46) by a fourthcoupling element (S4). 16. The transmission (2) according to claim êå, wherein the fourth coupling element(S4) is configured to connect and disconnect the output shaft (28) to and from theplanet wheel carrier (46) by a second actuator (A2). 81. The transmission (2) according to any one of the preceding claims, wherein thering wheel (40) is selectively connectable to the transmission housing (64) by a fifthcoupling element (S5). 9§. The transmission (2) according to claim 81, wherein the fifth coupling element (S5)is configured to connect and disconnect the ring wheel (40) to and from the transmis-sion housing (64) by a third actuator (A3). 492. The transmission (2) according to claims 16 and 81, wherein the fifth couplingelement (S5) is configured to connect and disconnect the ring wheel (40) to and fromthe transmission housing (64) by the second actuator (A2). MQ. The transmission (2) according to any one of the preceding claims, wherein theplanet wheel carrier (46) is configured to be selectively connectable to the drive wheels(16) of the vehicle (1) by a sixth coupling element (S6). 4-2fl. The transmission (2) according to claim HQ, wherein the sixth coupling ele-ment (S6) is configured to connect and disconnect the planet wheel carrier (46) to andfrom the drive wheels (16) by a fourth actuator (A4). 432. The transmission (2) according to any one of claims 4-1-fland 1-2fl, whereinthe planet wheel carrier (46) is configured to be selectively connectable to the ringwheel (40) by the sixth coupling element (S6). -1-4Q. The transmission (2) according to any one of the preceding claims, wherein afirst power consumer (20) is connected to the first main shaft (24) and a second powerconsumer (22) is connected to the second main shaft (26). 45
3. The transmission (2) according to any one of the preceding claims, wherein thefirst propulsion unit (4) is a first electrical machine and the second propulsion unit (6)is a second electrical machine. -161_5. A vehicle (1), comprising a transmission (2) according to any one of the pre-ceding claims. Il-ïfi. A method, performed by a control device (100), for shifting gears in a transmis-sion (2) for a vehicle (1), the transmission (2) comprises: a first main shaft (24) and a second main shaft (26), wherein the first main shaft(24) is configured to be connected to a first propulsion unit (4) and the second mainshaft (26) is configured to be connected to a second propulsion unit (6); an output shaft (28); a lay shaft (32) connected to the first main shaft (24), the second main shaft(26) and the output shaft (28); a first gear pair (G1) connected to the first main shaft (24) and connectable tothe lay shaft (32) by a first coupling element (S1); a second gear pair (G2) connected to the second main shaft (26) and connect-able to the lay shaft (32) by a second coupling element (S2); a third gear pair (G3) connected to the lay shaft (32) and to the output shaft (28);and a range gearbox (34) comprising: a planetary gear (36) comprising a sun wheel (38) connected to the output shaft28); a ring wheel (40) connectable to a transmission housing (64); and at least one planet wheel (42) and a planet wheel carrier (46) configured to beconnected to drive wheels (16) of the vehicle (1 ); wherein the transmission (2) comprises a fourth gear pair (G4) connected to thefirst gear pair (G1) and connectable to the planet wheel carrier (46) and wherein the first dear pair (G1) and the fourth Gear pair (G4) have a common Qearwheel; the method comprises the steps of: synchronizing (s101) the rotational speed of the planet wheel carrier (46) and aseventh gearvvheel (66) ofthe fourth gear pair (G4); connecting (s102) the seventh geanNheel (66) of the fourth gear pair (G4) to theplanet wheel carrier (46); disconnecting (s103) the ring wheel (40) from the transmission housing (64); synchronizing (s104) the rotational speed of the sun wheel (38) and the planetwheel carrier (46); and connecting (s105) the sun wheel (38) and the planet wheel carrier (46). 481_7. The method according to claim Il-Zfi, wherein the step of synchronizing (s101)the rotational speed of the planet wheel carrier (46) and a seventh gean/vheel (66 ofthe fourth gear pair (G4) comprising synchronizing the rotational speed of the planetwheel carrier (46) and a seventh gearvvheel (66) of the fourth gear pair (G4) by meansof the first propulsion unit (4). Il-Qß. The method according to any one of claims -1-7-ßand -1-81_7, wherein the step ofconnecting (s102) the seventh geanNheel (66) of the fourth gear pair (G4) to the planetwheel carrier (46) comprising connecting (s102) the seventh gear\Nheel (66) of thefourth gear pair (G4) to the planet wheel carrier (46) by means of a third coupling ele-ment (S3). ZQQ. The method according to any one of claims 4-7-ß- 1-9ß, wherein the step ofdisconnecting (s103) the ring wheel (40) from the transmission housing (64), com-prises disconnecting the ring wheel (40) from the transmission housing (64) by control-ling a fifth coupling element (S5). 2-1ä. The method according to any one of claims 1-7-ß- QQQ, wherein the step ofsynchronizing (s104) the rotational speed of the sun wheel (38) and the planet wheelcarrier (46) comprising synchronizing the rotational speed of the sun wheel (38) andthe planet wheel carrier (46) by means of the second propulsion unit (6). QZÄ. The method according to any one of claims 1-7-ß- Q-1Q, wherein the step ofconnecting (s105) the sun wheel (38) and the planet wheel carrier (46) comprises con-necting the sun wheel (38) and the planet wheel carrier (46) by means of a fourthcoupling element (S4). QQQ. A computer program (P) comprising instructions which, when the program isexecuted by a computer (100; 500), cause the computer (100; 500) to carry out themethod according to any one of claims 1-7-ß- QZÄ. MQ. A computer-readable medium comprising instructions, which when executedby a computer (100; 500), cause the computer (100; 500) to carry out the method ac-cording to any one of claims 1-7-1_6- 222_1.
SE1951420A 2019-12-10 2019-12-10 A transmission for a vehicle SE543847C2 (en)

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DE102022204747A1 (en) * 2022-05-16 2023-11-16 Zf Friedrichshafen Ag Drive device for a work machine

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