CN107709073B - Vehicle, drive system for vehicle and method for operating multi-mode transmission - Google Patents

Vehicle, drive system for vehicle and method for operating multi-mode transmission Download PDF

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Publication number
CN107709073B
CN107709073B CN201680037843.6A CN201680037843A CN107709073B CN 107709073 B CN107709073 B CN 107709073B CN 201680037843 A CN201680037843 A CN 201680037843A CN 107709073 B CN107709073 B CN 107709073B
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China
Prior art keywords
engine
gear
electromagnetic device
gear set
coupled
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Expired - Fee Related
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CN201680037843.6A
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Chinese (zh)
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CN107709073A (en
Inventor
A·J·科特洛斯基
D·舒克拉
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Oshkosh Corp
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Oshkosh Corp
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Priority claimed from US14/792,532 external-priority patent/US9650032B2/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/44—Series-parallel type
    • B60K6/445—Differential gearing distribution 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
    • 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
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/30—Control strategies involving selection of transmission gear ratio
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
    • B60W30/18—Propelling the vehicle
    • B60W30/192—Mitigating problems related to power-up or power-down of the driveline, e.g. start-up of a cold engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
    • F16H3/72—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion with a secondary drive, e.g. regulating motor, in order to vary speed continuously
    • F16H3/727—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion with a secondary drive, e.g. regulating motor, in order to vary speed continuously with at least two dynamo electric machines for creating an electric power path inside the gearing, e.g. using generator and motor for a variable power torque path
    • F16H3/728—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion with a secondary drive, e.g. regulating motor, in order to vary speed continuously with at least two dynamo electric machines for creating an electric power path inside the gearing, e.g. using generator and motor for a variable power torque path with means to change ratio in the mechanical gearing
    • 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
    • B60K6/26—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 motors or the generators
    • B60K2006/268—Electric drive motor starts the engine, i.e. used as starter 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
    • 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
    • B60K2006/381—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 characterized by driveline brakes
    • 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
    • F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
    • F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
    • F16H37/0833—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with arrangements for dividing torque between two or more intermediate shafts, i.e. with two or more internal power paths
    • F16H37/084—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with arrangements for dividing torque between two or more intermediate shafts, i.e. with two or more internal power paths at least one power path being a continuously variable transmission, i.e. CVT
    • F16H2037/0866—Power split variators with distributing differentials, with the output of the CVT connected or connectable to the output shaft
    • F16H2037/0873—Power split variators with distributing differentials, with the output of the CVT connected or connectable to the output shaft with switching, e.g. to change ranges
    • 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
    • F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
    • F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
    • F16H37/0833—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with arrangements for dividing torque between two or more intermediate shafts, i.e. with two or more internal power paths
    • F16H37/084—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with arrangements for dividing torque between two or more intermediate shafts, i.e. with two or more internal power paths at least one power path being a continuously variable transmission, i.e. CVT
    • F16H2037/088—Power split variators with summing differentials, with the input of the CVT connected or connectable to the input shaft
    • F16H2037/0886—Power split variators with summing differentials, with the input of the CVT connected or connectable to the input shaft with switching means, e.g. to change ranges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/20—Transmissions using gears with orbital motion
    • F16H2200/2002—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears
    • F16H2200/2007—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears with two sets of 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
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/20—Transmissions using gears with orbital motion
    • F16H2200/203—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes
    • F16H2200/2041—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes with four engaging means
    • 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

Abstract

The invention relates to a vehicle, a drive system for a vehicle and a method of operating a multi-mode transmission. A vehicle includes: an engine; a drive axle; a multi-mode transmission selectively coupled to the engine and the transaxle; and a controller, the multi-mode transmission comprising: a first gear set having a first planet gear carrier and a second gear set having a second planet gear carrier, wherein the first gear set is coupled to the engine, and wherein the first planet gear carrier and the second planet gear carrier are rotationally coupled; a first motor/generator coupled to the first gear set; and a second motor/generator electrically coupled to the first motor/generator, to the second gear set, and selectively coupled to the engine with a bus.

Description

Vehicle, drive system for vehicle and method for operating multi-mode transmission
Cross reference to related patent applications
This application claims priority from U.S. application No. 14/792,532 filed on 6/7/2015. Application 14/792,532 is a partially-filed continuation-in-part application of U.S. application 14/624,285 filed on 17.2.2015, which is hereby incorporated by reference in its entirety.
Technical Field
The invention relates to a vehicle, a drive system for a vehicle and a method of operating a multi-mode transmission.
Background
Internal combustion, hybrid, and electric vehicles, as well as other types of vehicles, include a transmission. Conventional vehicle transmissions use gears and gear trains to provide speed and torque conversion from a source of rotational power (e.g., an engine, an electric motor, etc.) to another device (e.g., a drive shaft, wheels, etc.). The transmission includes a plurality of gear ratios that are selectively coupled to a source of rotational power using a mechanism that may also selectively couple the output to the various gear ratios.
Disclosure of Invention
One exemplary embodiment relates to a vehicle including: an engine; a drive axle; a multi-mode transmission selectively coupled to the engine and the transaxle; and a controller coupled to the multi-mode transmission and configured to selectively configure the multi-mode transmission in an active neutral start mode of operation in response to an engine start request. A multi-mode transmission includes: a first gear set having a first planet gear carrier and a second gear set having a second planet gear carrier; a first motor/generator coupled to the first gear set; and a second motor/generator electrically coupled to the first motor/generator, to the second gear set, and selectively coupled to the engine with a bus. The first gear set is coupled to the engine, and the first and second planet gear carriers are rotationally coupled.
Another exemplary embodiment relates to a drive system for a vehicle having a transaxle. The drive system includes: a first gear set including a first sun gear, a first ring gear, a plurality of first planet gears coupling the first sun gear to the first ring gear, and a first carrier rotationally supporting the plurality of first planet gears; a second gear set including a second sun gear, a second ring gear, a plurality of second planet gears coupling the second sun gear to the second ring gear, and a second carrier rotatably supporting the plurality of second planet gears, the first carrier being directly coupled to the second carrier; a first motor coupled to the first gear set; a second electric machine coupled to a second gear set; a connecting shaft coupling the engine to the first gear set; a brake positioned to selectively restrict rotational movement of the second ring gear when engaged; and a clutch that, when engaged, selectively rotationally couples the second electric machine to the connecting shaft and the engine. The drive system is selectively reconfigurable into an active neutral start mode of operation in response to a rotational input from the engine, whereby at least one of the first and second electric machines provides starting power.
Another exemplary embodiment relates to a method of operating a multi-mode transmission, comprising the steps of: receiving an engine start request associated with an engine, the engine coupled to a first electromagnetic device via a first gear set; engaging the clutch to selectively rotationally couple the second electromagnetic device and the second gear set to the engine; engaging a brake to selectively restrict rotational movement of a ring gear of a second gear set, a carrier of the second gear set being coupled to a carrier of the first gear set; generating a starting power by providing a rotational input to the first electromagnetic device with the engine; and activating, with the controller, at least one of the first electromagnetic device and the second electromagnetic device to a desired operating state in response to the startup power exceeding the threshold level.
The invention is capable of other embodiments and of being practiced and carried out in various ways. Alternative exemplary embodiments relate to other features and combinations of features as may be enumerated herein.
Drawings
The present disclosure will be more fully understood from the following detailed description taken in conjunction with the accompanying drawings, in which like reference numerals refer to like elements, and in which:
FIG. 1 is a schematic illustration of a drive train for a vehicle according to an exemplary embodiment;
FIG. 2 is a detailed schematic diagram of the powertrain of FIG. 1, according to an exemplary embodiment;
FIG. 3 is a schematic illustration of a control system for the powertrain of FIG. 1, according to an exemplary embodiment;
FIG. 4 is a detailed schematic diagram of a powertrain configured in a start-up mode of operation, according to an exemplary embodiment;
FIG. 5 is a detailed schematic diagram of a powertrain configured in a low range mode of operation according to an exemplary embodiment;
FIG. 6 is a detailed schematic diagram of a powertrain configured in a mid range mode of operation according to an exemplary embodiment;
FIG. 7 is a detailed schematic diagram of a powertrain configured in a high range mode of operation according to an exemplary embodiment;
FIG. 8 is a detailed schematic diagram of a powertrain configured in an intermediate shift operating mode according to an exemplary embodiment;
FIG. 9 is a detailed schematic diagram of a powertrain configured in a low speed reverse mode of operation according to an exemplary embodiment; and
FIG. 10 is a detailed schematic diagram of a powertrain configured in a high speed reverse mode of operation according to an exemplary embodiment.
Detailed Description
Before turning to the figures, which illustrate exemplary embodiments in detail, it is to be understood that the application is not limited to the details or methodology set forth in the description or illustrated in the figures. It is also to be understood that the terminology is for the purpose of description and should not be regarded as limiting.
According to an exemplary embodiment, a multi-mode, electro-mechanically variable transmission is provided as part of a vehicle and is selectively reconfigurable into one of a plurality of operating modes. The vehicle may also include an engine, a first electromagnetic device, and a second electromagnetic device. In one embodiment, at least one of the first electromagnetic device and the second electromagnetic device provides rotational mechanical energy for starting the engine. In another embodiment, the engine provides a rotational mechanical energy input to both the first electromagnetic device and the second electromagnetic device such that each of the first electromagnetic device and the second electromagnetic device operates as a generator that generates electrical power. In still other embodiments, one of the first electromagnetic device and the second electromagnetic device is configured to receive a rotational mechanical energy output from at least one of the engine and the multi-mode electro-mechanical variable transmission and provide an electrical energy output that powers the control system and/or the other electromagnetic device.
According to the exemplary embodiment shown in fig. 1-2, vehicle 10 includes an engine 20 coupled to a transmission, shown as transmission 30. In one embodiment, the engine 20 is configured to combust fuel and provide mechanical energy input to the transmission 30. For example, the engine 20 may be configured to provide a rotational mechanical energy input to the transmission 30. 1-2, a first electric machine, electromagnetic device, and/or motor/generator, shown as first electromagnetic device 40, and a second electric machine, electromagnetic device, and/or motor/generator, shown as second electromagnetic device 50, are coupled to transmission 30.
Referring again to the exemplary embodiment shown in FIG. 1, vehicle 10 includes a front axle, shown as front axle 60, and a rear axle, shown as rear axle 70. As shown in fig. 1, front axle 60 includes a pair of traction elements, shown as tires 62, coupled to a front differential, shown as front differential 64. Rear axle 70 includes a pair of traction elements, shown as tires 72, coupled to a rear differential, shown as a rear differential 74, according to an exemplary embodiment. According to the exemplary embodiment shown in FIG. 1, front differential 64 is coupled to transmission 30 with a front axle drive shaft 66, and rear differential 74 is coupled to transmission 30 with a rear axle drive shaft 76. Although shown coupled to tires 62 and 72, front and rear differentials 64 and 74 may be coupled to various other types of traction elements (e.g., rails, etc.) according to alternative embodiments. As shown in FIG. 1, front axle drive shaft 66 and rear axle drive shaft 76 are configured to transmit power from first electromagnetic device 40, second electromagnetic device 50, and engine 20 to tires 62 and 72, respectively. Vehicle 10 may include multiple front differentials 64 that may be coupled or multiple rear differentials 74 that may be coupled according to various alternative embodiments.
The engine 20 may be any source of rotational mechanical energy derived from a stored energy source. The stored energy source is disposed on the vehicle 10 according to an exemplary embodiment. The stored energy source may include liquid or gaseous fuel according to other alternatives. In one embodiment, the engine 20 comprises an internal combustion engine configured to be powered by at least one of gasoline, natural gas, and diesel fuel. According to various alternative embodiments, the engine 20 comprises at least one of a turbine, a fuel cell, an electric motor, or yet another device. According to an exemplary embodiment, the engine 20 comprises a twelve liter diesel engine capable of providing approximately 400 horsepower to approximately 600 horsepower and approximately 400 foot-pounds torque to approximately 2000 foot-pounds torque. In one embodiment, the engine 20 has a rotational speed (e.g., a rotational operating range, etc.) between 0 and 2100 revolutions per minute. The engine 20 may be operated at a relatively constant speed (e.g., 1600 revolutions per minute, etc.). In one embodiment, the relatively constant speed is selected based on operating conditions of the engine 20 (e.g., operating speeds associated with increased fuel efficiency points, etc.).
In one embodiment, at least one of first electromagnetic device 40 and second electromagnetic device 50 provide a mechanical energy input to transmission 30. For example, at least one of first electromagnetic device 40 and second electromagnetic device 50 may be configured to provide a rotational mechanical energy input to transmission 30 (i.e., at least one of first electromagnetic device 40 and second electromagnetic device 50 may operate as a motor, etc.). At least one of first electromagnetic device 40 and second electromagnetic device 50 may receive a mechanical energy output from at least one of engine 20 and transmission 30. For example, at least one of first electromagnetic device 40 and second electromagnetic device 50 may be configured to receive a rotational mechanical energy output from at least one of engine 20 and transmission 30 and provide an electrical energy output (i.e., at least one of first electromagnetic device 40 and second electromagnetic device 50 may operate as a generator, etc.). According to an exemplary embodiment, first electromagnetic device 40 and second electromagnetic device 50 are both capable of providing mechanical energy and converting a mechanical energy input into an electrical energy output (i.e., operating as a motor, a generator, etc.). Operating conditions of first and second electromagnetic devices 40, 50 (e.g., as motors, as generators, etc.) may vary based on the operating mode associated with transmission 30.
According to the exemplary embodiment shown in FIG. 2, a drive system for a vehicle (shown as drive system 100) includes engine 20, transmission 30, first electromagnetic device 40, second electromagnetic device 50, front axle drive shaft 66, and rear axle drive shaft 76. As shown in fig. 2, the transmission 30 includes a first gear set, shown as a power split planetary gear 110, and a second gear set, shown as an output planetary gear 120. In one embodiment, power split planetary gear 110 and output planetary gear 120 are disposed between first electromagnetic device 40 and second electromagnetic device 50. In an alternative embodiment, one or both of power split planetary gear 110 and output planetary gear 120 are positioned external to (i.e., not between, etc.) first electromagnetic device 40 and second electromagnetic device 50. As shown in fig. 2, the power splitting planetary gear 110 is directly coupled to the engine 20.
Referring to the exemplary embodiment shown in FIG. 2, power splitting planetary gear 110 is a planetary gear set that includes a sun gear 112, a ring gear 114, and a plurality of planet gears 116. A plurality of planet gears 116 couple the sun gear 112 to the ring gear 114 according to an exemplary embodiment. As shown in fig. 2, a carrier 118 rotatably supports a plurality of planet gears 116. In one embodiment, first electromagnetic device 40 is directly coupled to sun gear 112 such that power splitting planetary gear 110 is directly coupled to first electromagnetic device 40. For example, first electromagnetic device 40 may include a shaft (e.g., a first shaft, an input shaft, an output shaft, etc.) directly coupled to sun gear 112.
Still referring to the exemplary embodiment shown in FIG. 2, the output planetary gear 120 is a planetary gear set that includes a sun gear 122, a ring gear 124, and a plurality of planet gears 126. A plurality of planet gears 126 couple the sun gear 122 to the ring gear 124 according to an exemplary embodiment. As shown in fig. 2, a carrier 128 rotatably supports a plurality of planet gears 126. In one embodiment, second electromagnetic device 50 is directly coupled to sun gear 122 such that output planetary gear 120 is coupled to second electromagnetic device 50. For example, second electromagnetic device 50 may include a shaft (e.g., a second shaft, an input shaft, an output shaft, etc.) directly coupled to sun gear 122. The carrier 118 is directly coupled to the carrier 128 according to the exemplary embodiment shown in fig. 2, thereby coupling the power splitting planetary gear 110 to the output planetary gear 120. In one embodiment, directly coupling the carrier 118 to the carrier 128 synchronizes the rotational speed of the carrier 118 and the carrier 128.
According to an exemplary embodiment, transmission 30 includes a first clutch, shown as a power split coupled clutch (power split coupled clutch) 130. In one embodiment, the power-split coupled clutch 130 is positioned downstream of the power-split planetary gear 110 (e.g., between the power-split planetary gear 110 and the front axle drive shaft 66 or the rear axle drive shaft 76, etc.). In an alternative embodiment, the power-split coupling clutch 130 is coupled directly to the engine 20. As shown in fig. 2, the power split coupled clutch 130 is positioned to selectively couple the power split planetary gear 110 and the output planetary gear 120 with a shaft, shown as output shaft 32. In one embodiment, the power-split coupled clutch 130 allows the vehicle to be towed without rotating gears (e.g., power-split planetary gears 110, output planetary gears 120, etc.) within the transmission 30. The output shaft 32 may be coupled to the rear axle drive shaft 76 and to the front axle drive shaft with a split clutch assembly shown as a front split clutch sleeve shifter 34. A front disconnect clutch sleeve shifter 34 may be engaged and disengaged to selectively couple a front axle drive shaft 66 to the output shaft 32 of the transmission 30 (e.g., to facilitate vehicle operation in a rear-wheel-drive-only mode, an all-wheel-drive mode, a four-wheel-drive mode, etc.).
As shown in fig. 2, transmission 30 includes a second clutch, shown as input coupling clutch 140. Input coupling clutch 140 is positioned to selectively couple second electromagnetic device 50 with engine 20 according to an exemplary embodiment. Thus, the input coupling clutch 140 may selectively couple the engine 20 to the output planetary gear 120. As shown in fig. 2, transmission 30 includes a shaft shown as connecting shaft 36. According to an exemplary embodiment, connecting shaft 36 extends from engine 20 through second electromagnetic device 50 and through output planetary gear 120 to power split planetary gear 110. The connecting shaft 36 couples the engine 20 with the power splitting planetary gear 110 according to the exemplary embodiment shown in fig. 2. In one embodiment, the connecting shaft 36 directly couples the engine 20 with the ring gear 114 of the power split planetary 110. Input coupling clutch 140 may selectively couple second electromagnetic device 50 with connecting shaft 36. According to an exemplary embodiment, the shafts (e.g., input/output shafts, etc.) of first electromagnetic device 40 and second electromagnetic device 50 are aligned with (e.g., their centerlines are aligned with, etc.) power split planetary gear 110, output planetary gear 120, and connecting shaft 36. As shown in fig. 2, transmission 30 includes a third clutch, shown as output coupled clutch 150. An output coupling clutch 150 is positioned to selectively couple the output planetary gear 120 with the output shaft 32 according to an exemplary embodiment. In one embodiment, the output shaft 32 is radially offset from (e.g., radially offset from their centerlines, etc.) the power splitting planetary 110, the output planetary 120, and the connecting shaft 36.
Referring again to the exemplary embodiment shown in FIG. 2, the transmission 30 includes a brake, shown as output brake 170. The output brake 170 is positioned to selectively inhibit movement of at least a portion of the output planet gears 120 (e.g., the ring gear 124, etc.) according to an exemplary embodiment. In one embodiment, the output brake 170 is biased (e.g., with a spring, etc.) to an engaged position and selectively disengaged (e.g., by application of pressurized hydraulic fluid, etc.). In other embodiments, the output brake 170 is hydraulically biased and the spring is released. In still other embodiments, components of transmission 30 are still otherwise engaged and disengaged (e.g., pneumatically, etc.). For example, the output brake 170 and the output coupling clutch 150 may be engaged simultaneously to act as a driveline brake (e.g., a braking mechanism that decelerates the vehicle, etc.).
As shown in fig. 2, the transmission 30 includes a gear set 180, the gear set 180 coupling the carrier 118 and the carrier 128 to the output shaft 32. In one embodiment, gear set 180 includes a first gear, shown as gear 182, which meshes with a second gear, shown as gear 184. As shown in fig. 2, the gear 182 is rotationally coupled to the carrier 118 and the carrier 128. For example, the gear 182 may be secured to a component (e.g., a shaft, a tube, etc.) that couples the carrier 118 and the carrier 128. As shown in fig. 2, the split coupled clutch 130 is positioned to selectively couple the gear 184 with the output shaft 32 when engaged. With the power split coupling clutch 130 disengaged, relative motion (e.g., rotation, etc.) may occur between the gear 184 and the output shaft 32.
According to an exemplary embodiment, the transmission 30 includes a gear set, shown as gear set 190, that couples the output planet gears 120 to the output shaft 32. As shown in fig. 2, the gear set 190 includes a first gear, shown as gear 192, coupled to the ring gear 124 of the output planet gears 120. Gear 192 meshes with a second gear, shown as gear 194, according to an exemplary embodiment. As shown in fig. 2, gear 194 is coupled to a third gear, shown as gear 196. In other embodiments, gear 192 is directly coupled with gear 196. For example, gear set 190 may not include gear 194, and gear 192 may be directly coupled to gear 196 (e.g., meshed with gear 196, etc.). As shown in fig. 2, the output coupling clutch 150 is positioned to selectively couple the gear 196 with the output shaft 32 when engaged. With the output coupling clutch 150 disengaged, relative motion (e.g., rotation, etc.) may occur between the gear 196 and the output shaft 32. For example, the output coupling clutch 150 may be engaged to couple the ring gear 124 to the output shaft 32. Output brake 170 is positioned to selectively limit movement of gear 192 when engaged to thereby also limit movement of ring gear 124, gear 194 and gear 196.
According to the exemplary embodiment shown in fig. 3, a control system 200 for a vehicle includes a controller 210. In one embodiment, the controller 210 is configured to selectively engage, selectively disengage, or otherwise communicate with components of the vehicle according to various operating modes. As shown in fig. 3, the controller 210 is coupled to the engine 20. In one embodiment, the controller 210 is configured to selectively engage the engine 20 (e.g., interface with a throttle valve of the engine, etc.) such that the output of the engine 20 rotates at a target rate. Controller 210 is coupled to first electromagnetic device 40 and second electromagnetic device 50, and may send and receive signals with first electromagnetic device 40 and second electromagnetic device 50, according to an exemplary embodiment. For example, controller 210 may send command signals related to at least one of a target rotational speed and a target rotational direction for first electromagnetic device 40 and second electromagnetic device 50. As shown in FIG. 3, first electromagnetic device 40 and second electromagnetic device 50 are electrically coupled. For example, the power generated by first electromagnetic device 40 may be used by second electromagnetic device 50 (e.g., to provide output torque as a motor, etc.), or the power generated by second electromagnetic device 50 may be used by first electromagnetic device 40 (e.g., to provide output torque as a motor, etc.).
According to the exemplary embodiment shown in fig. 3, control system 200 includes a user interface 220 coupled to controller 210. In one embodiment, the user interface 220 includes a display and operator inputs. The display may be configured to display a graphical user interface, images, icons, or still other information. In one embodiment, the display includes a graphical user interface configured to provide basic information about the vehicle (e.g., vehicle speed, fuel level, warning lights, etc.). The graphical user interface may also be configured to display the current operating mode, various potential operating modes, or other information also related to transmission 30 or drive system 100. For example, the graphical user interface may be configured to provide specific information regarding the operation of drive system 100 (e.g., fault conditions where at least one of split coupled clutch 130, input coupled clutch 140, output coupled clutch 150, and output brake 170 is engaged or disengaged, at least one of split coupled clutch 130, input coupled clutch 140, output coupled clutch 150, and output brake 170 fails to engage or disengage in response to a command signal, etc.).
The operator input may be used by an operator to provide commands to at least one of engine 20, transmission 30, first electromagnetic device 40, second electromagnetic device 50, and yet another component of drive system 100 or the vehicle. The operator input may include one or more buttons, knobs, touch screens, switches, levers, or handles. In one embodiment, an operator may press a button to change the operating mode of the vehicle and at least one of the transmission 30 and the drive system 100. The operator may be able to manually control some or all aspects of the operation of the transmission 30 using the display and operator inputs. It should be understood that any type of display or input controller may be implemented using the systems and methods described herein.
The controller 210 may be implemented as a general purpose processor, an Application Specific Integrated Circuit (ASIC), one or more Field Programmable Gate Arrays (FPGAs), a Digital Signal Processor (DSP), a circuit containing one or more processing components, a circuit for supporting a microprocessor, a set of processing components, or other suitable electronic processing components. According to the exemplary embodiment shown in fig. 3, controller 210 includes processing circuitry 212 and memory 214. The processing circuitry 212 may include an ASIC, one or more FPGAs, a DSP, circuitry containing one or more processing components, circuitry for supporting a microprocessor, a set of processing components, or other suitable electronic processing components. In some embodiments, the processing circuit 212 is configured to execute computer code stored in the memory 214 to facilitate the activities described herein. Memory 214 may be any volatile or non-volatile computer-readable storage medium capable of storing data or computer code related to the activities described herein. According to an exemplary embodiment, the memory 214 includes computer code modules (e.g., executable code, object code, source code, script code, machine code, etc.) configured to be executed by the processing circuit 212. Memory 214 includes various actuation profiles corresponding to operating modes (e.g., for transmission 30, for drive system 100, for a vehicle, etc.) according to an exemplary embodiment. In some implementations, the controller 210 may represent a collection of processing devices (e.g., servers, data centers, etc.). In this case, processing circuit 212 represents a collective processor of the device, and memory 214 represents a collective storage of the device.
Referring next to the exemplary embodiment illustrated in fig. 4-10, transmission 30 is configured to operate according to a plurality of operating modes. Various operating modes for transmission 30 are identified below in table 1. In other embodiments, a vehicle having transmission 30 is configured to operate according to the various operating modes shown in fig. 4-10 and identified below in table 1.
TABLE 1
Figure GDA0002382243050000091
As shown in Table 1, "X" represents a component of drive system 100 (e.g., output brake 170, power-split coupling clutch 130, etc.) that is engaged or closed during the respective operating mode. In one embodiment, all of the components in table 1 are disengaged to selectively reconfigure transmission 30 in a neutral mode.
As shown in fig. 4, transmission 30 is selectively reconfigured into an active neutral start mode of operation (e.g., a vehicle launch mode of operation, an active neutral mode of operation, etc.). The controller 210 may selectively configure the transmission 30 in an active neutral start mode of operation in response to a vehicle start request and/or an engine start request. Controller 210 may selectively configure transmission 30 from a passive neutral operating mode (e.g., a mode whereby engine 20 is running but no output torque is provided to tires 62 and/or tires 72) to an active neutral start operating mode. In one embodiment, controller 210 selectively configures transmission 30 to a passive neutral operating mode first (e.g., by starting engine 20, etc.) and thereafter selectively configures transmission 30 to an active neutral start operating mode in response to a vehicle start request and/or an engine start request. Transmission 30 may be reconfigured to a passive neutral operating mode at various times during vehicle operation (e.g., when entering a park operating mode from a drive operating mode for towing the vehicle).
In one embodiment, the engine 20 includes a conventional starting mechanism (e.g., a starter motor, etc.) configured to start the engine 20 (e.g., in response to a vehicle start request, in response to an engine start request, etc.). The vehicle start request and/or the engine start request may include an indication to change the engine from an "off state to an" on "state. The vehicle may include push buttons, a graphical user interface, an ignition switch, and another device with which the user interacts to provide or trigger vehicle start requests and/or engine start requests. In other embodiments, the vehicle start request and/or the engine start request are generated by an autonomous control system configured to command the vehicle or the engine to transition from an "off state to an" on "state. The controller 210 may provide a signal to the first starter engine 20 in response to a vehicle start request and/or an engine start request, and thereafter selectively configure the transmission 30 in an active neutral start mode of operation.
In the active neutral start mode of operation, engine 20 may provide a rotational mechanical energy input to at least one of first electromagnetic device 40 and second electromagnetic device 50. In one embodiment, first electromagnetic device 40 is coupled to second electromagnetic device 50 using a bus. The bus may include electrical connections, and the voltage generated by first electromagnetic device 40 in response to a rotational input from engine 20 may be applied to the bus. First electromagnetic device 40 may generate a voltage that is applied to the bus when transmission 30 is configured in the active neutral start mode of operation. In another embodiment, at least one of first electromagnetic device 40 and second electromagnetic device 50 may provide a starting power in response to a rotational input from engine 20.
In the active neutral start mode of operation, engine 20 powers at least one of first electromagnetic device 40 and second electromagnetic device 50, which at least one of first electromagnetic device 40 and second electromagnetic device 50 is caused to reach a threshold level (e.g., a threshold speed for a target time period, a performance to provide a threshold amount of power generation for a target time period, a performance to provide a threshold start power, etc.). The threshold level may be related to a requisite DC bus voltage required to activate at least one of first electromagnetic device 40 and second electromagnetic device 50. The power electronics of the control system 200 that control the motor-to-motor function may be brought online during the active neutral start mode. In one embodiment, controller 210 activates and/or activates first electromagnetic device 40 and/or second electromagnetic device 50 to a desired state in response to first electromagnetic device 40 operating within a desired state at a threshold level. In another embodiment, controller 210 disengages at least one of input coupling clutch 140 and output brake 170 in response to first electromagnetic device 40 operating at a threshold level.
According to an exemplary embodiment, the transmission 30 is selectively reconfigured to an active neutral start mode of operation during an initial start of the engine 20 (e.g., upon engine transition from an "off" state to an "on" state, etc.). The active neutral start mode may be different from other neutral operating modes associated with the vehicle (e.g., during non-start conditions, etc.), wherein first and second electromagnetic devices 40 and 50 are already actuatable to a desired state and/or are otherwise online.
In an alternative embodiment, at least one of first and second electromagnetic devices 40, 50 includes and/or is coupled to an energy storage device (e.g., a capacitor, a battery, etc.) configured to store energy (e.g., electrical energy, chemical energy, etc.) associated with drive system 100. In one embodiment, rotation of first electromagnetic device 40 rotates connecting shaft 36 to start engine 20. For example, first electromagnetic device 40 may be configured to use the stored energy to start engine 20 by providing a rotational mechanical energy input (e.g., torque, etc.) to engine 20 via connecting shaft 36. In another embodiment, rotation of second electromagnetic device 50 rotates connecting shaft 36 (e.g., with input coupling clutch 140 engaged) to start engine 20. For example, second electromagnetic device 50 may be configured to use the stored energy to start engine 20 by providing a rotational mechanical energy input (e.g., torque, etc.) to engine 20 via engagement of input coupling clutch 140 with connecting shaft 36. This active neutral start mode may be used to start engine 20, create a requisite DC bus voltage, and/or otherwise output power without relying on controller 210 to engage first electromagnetic device 40 and/or second electromagnetic device 50.
As shown in fig. 4 and table 1, the input coupling clutch 140 and the output brake 170 are engaged when the transmission 30 is configured in an active neutral start mode. As shown in fig. 4, input coupling clutch 140 directly couples second electromagnetic device 50 to connecting shaft 36 and engine 20. The output brake 170 rotationally fixes the ring gear 124. When engine 20 provides a rotational mechanical energy input to transmission 30, connecting shaft 36 drives both power splitting planetary gear 110 (e.g., directly, etc.) and output planetary gear 120 (e.g., via second electromagnetic device 50, etc.). According to an exemplary embodiment shown in FIG. 4, the energy flow path for the active neutral start mode includes: the engine 20 provides a rotational mechanical energy input to the connecting shaft 36; connecting shaft 36 delivers rotational mechanical energy to ring gear 114 and second electromagnetic device 50 (e.g., via input coupling clutch 140, etc.); and second electromagnetic device 50 transfers rotational mechanical energy input to sun gear 122. With the rotation of the ring gear 124 selectively fixed by the output brake 170, the rotation of the sun gear 122 causes the plurality of planet gears 126 to rotate about their central axes, as well as about the sun gear 122. The rotation of the plurality of planet gears 126 about the sun gear 122 drives the carrier 128, and the carrier 128, in turn, drives the carrier 118.
Still referring to FIG. 4, ring gear 114 is directly driven by connecting shaft 36. As shown in fig. 4, the carrier 118 is indirectly driven by the connecting shaft 36 (e.g., driven by the output planetary gears 120 while engaging the input coupling clutch 140, etc.). Rotation of the ring gear 114 and carrier 118 causes the plurality of planet gears 116 to rotate about their central axes, causing the sun gear 112 to rotate. Rotation of sun gear 112 drives first electromagnetic device 40. In one embodiment, first electromagnetic device 40 thus provides startup power in response to rotational input from engine 20. Rotation of sun gear 112 may facilitate first electromagnetic device 40 creating requisite operating conditions (e.g., requisite DC bus voltages, etc.) for controlling first electromagnetic device 40 and/or second electromagnetic device 50 in one or more desired states. In some embodiments, second electromagnetic device 50 is caused to reach a threshold value independently of or in conjunction with first electromagnetic device 40 to create the requisite DC bus voltage and control first electromagnetic device 40 and/or second electromagnetic device 50 in a desired state.
Alternative energy flow paths in an active neutral start mode in which drive system 100 includes an energy storage device may include: first electromagnetic device 40 provides a rotational mechanical energy input to sun gear 112 that is received by a plurality of planet gears 116; a plurality of planet gears 116 transfer rotational mechanical energy to the ring gear 114; and ring gear 114 transfers the rotational mechanical energy to connecting shaft 36 such that the rotational mechanical energy provided by first electromagnetic device 40 starts engine 20.
According to the exemplary embodiment shown in fig. 4, engaging input coupling clutch 140 causes second electromagnetic device 50 to rotate at the rotational speed of connecting shaft 36. Connecting shaft 36 may rotate at the same speed as engine 20 such that engine 20 and second electromagnetic device 50 operate at a 1:1 speed ratio. According to the exemplary embodiment shown in fig. 4, the engaged input coupling clutch 140 and output brake 170 rotate the carrier 118 (e.g., via the output planet gears 120, etc.) while the ring gear 114 rotates with the connecting shaft 36. Engaging input coupling clutch 140 and output brake 170 may drive first electromagnetic device 40 at a rotational speed related to a rotational speed of carrier 118 and a rotational speed of ring gear 114. In one embodiment, the active neutral start mode locks first electromagnetic device 40 and second electromagnetic device 50 at a fixed speed ratio to engine 20 (e.g., 1:1 between second electromagnetic device 50 and engine 20; 1.06:1 between first electromagnetic device 40 and engine 20, etc.).
Still referring to FIG. 4, the transmission 30 isolates the engine 20 from the output shaft 32 during the active neutral start mode (e.g., the power-split coupling clutch 130 and the output coupling clutch 150 may be disengaged, etc.). Such isolation may reduce (e.g., substantially eliminate, etc.) the potential for a sudden forward lean traditionally associated with starting the vehicle (e.g., transmission 30 does not provide output torque to tires 62 and/or tires 72, etc. while in an active neutral start mode, etc.).
In some embodiments, input coupling clutch 140 and output brake 170 remain engaged after first electromagnetic device 40 and/or second electromagnetic device 50 are activated to one or more desired operating states. With transmission 30 in the active neutral start mode and first and/or second electromagnetic devices 40, 50 activated to one or more desired operating states, drive system 100 may generate electrical power. For example, rotation of connecting shaft 36 may rotate first electromagnetic device 40 and/or second electromagnetic device 50 to generate electrical power. In one embodiment, the power is stored for future use. In another embodiment, the electrical power is used to actively power a device associated with the vehicle. In yet another embodiment, the electrical power is used to power an external device (e.g., provide output power, etc.).
In other embodiments, at least one of input coupled clutch 140 and output brake 170 is disengaged in response to the generated startup power, the speed of first electromagnetic device 40 and/or second electromagnetic device 50, the generated voltage, and/or the generated voltage and the generation time exceeding a threshold level. This disengagement may prepare the transmission 30 for being selectively reconfigured into a driving mode (e.g., low, mid, high, etc.). For example, input coupling clutch 140 may be disengaged in response to activation and control of first electromagnetic device 40 and second electromagnetic device 50 (e.g., by controller 210, etc.). Only the power-split coupling clutch 130 may need to be engaged to selectively reconfigure the transmission 30 to the mid-range mode, thereby providing a simple and efficient process by which the vehicle may be shifted to a drive mode and driven. In one embodiment, activating one or more of the electromagnetic devices includes controlling second electromagnetic device 50 in a motoring mode, in which second electromagnetic device 50 provides input torque to transmission 30 and is commanded to operate at a target speed. Such a speed may be based on a current vehicle speed (e.g., zero when the vehicle is not moving on level ground, non-zero when the vehicle is driving up or down a slope at startup, etc.). Commanding operation of second solenoid 50 may prepare transmission 30 for a shift from an active neutral start mode of operation (i.e., selective reconfiguration, etc.) to another drive mode of operation (e.g., a mid-range mode of operation, etc.). This preparation may reduce the pitching of the output shaft 32 during the shift.
As shown in fig. 5, transmission 30 is selectively reconfigured into a low range mode of operation such that transmission 30 allows low output speed operation with high output torque. The low mode improves gradability (e.g., facilitates the vehicle maintaining speed in grade, etc.) of the vehicle. In one embodiment, engine 20 provides a rotational mechanical energy input to transmission 30 such that first electromagnetic device 40 generates electrical power and second electromagnetic device 50 uses the generated electrical power to provide a rotational mechanical energy input to transmission 30. It can thus be seen that engine 20 and second electromagnetic device 50 provide a rotational mechanical energy input that drives at least one of tires 62 and tires 72. In an alternative embodiment, first electromagnetic device 40 operates as a motor and second electromagnetic device 50 operates as a generator when transmission 30 is configured in the low range mode.
As shown in fig. 5 and table 1, power-split coupled clutch 130 and output coupled clutch 150 are engaged when transmission 30 is configured in the low mode. As shown in fig. 5, power split coupled clutch 130 and output coupled clutch 150 couple gear set 180 and gear set 190, respectively, to output shaft 32. Thus, when engine 20 provides a rotational mechanical energy input to transmission 30, both power splitting planetary 110 and output planetary 120 drive output shaft 32 via gear set 180 and gear set 190, respectively. According to the exemplary embodiment shown in fig. 5, the energy flow path for the low gear comprises: the engine 20 provides a rotational mechanical energy input to the connecting shaft 36; connecting shaft 36 delivers rotational mechanical energy to ring gear 114; the ring gear 114 causes the plurality of planet gears 116 to rotate about their central axes and also about the sun gear 112, causing both the carrier 118 and the sun gear 112 to rotate; and rotation of sun gear 112 drives first electromagnetic device 40 such that first electromagnetic device operates as a generator (e.g., generates electrical energy, etc.).
Still referring to fig. 5, rotation of the carrier 118 drives both the carrier 128 and the gear set 180. The carrier 128 drives a plurality of planet gears 126 in rotation about the sun gear 122 and about their central axes. In one embodiment, second electromagnetic device 50 receives electrical energy generated by first electromagnetic device 40. Thus, second electromagnetic device 50 operates as a motor to provide a rotational mechanical energy input to sun gear 122. The sun gear 122 delivers rotational mechanical energy to a plurality of planet gears 126, causing each planet gear to further rotate about its central axis. The plurality of planet gears 126 drive the ring gear 124, and rotation of the ring gear 124 drives the gear set 190. According to the exemplary embodiment shown in fig. 6, gear set 180 and gear set 190 transfer torque to output shaft 32 and from output shaft 32 with power split coupled clutch 130 and output coupled clutch 150 engaged. It can be seen that engine 20 and second electromagnetic device 50 cause the vehicle to move at a low speed with a high output torque.
As shown in fig. 6, transmission 30 is selectively reconfigured into a mid-range mode of operation such that transmission 30 allows mid-range output speed operation. The mid-range mode may improve low output speed torque and high output speed power. In one embodiment, engine 20 provides a rotational mechanical energy input such that first electromagnetic device 40 generates electrical power and second electromagnetic device 50 uses the generated electrical power to provide a rotational mechanical energy input to transmission 30. Thus, second electromagnetic device 50 provides a rotational mechanical energy input that drives at least one of tires 62 and tires 72. In an alternative embodiment, second electromagnetic device 50 operates as a generator and first electromagnetic device 40 operates as a motor when transmission 30 is configured in the mid-range mode. In yet another alternative embodiment, both first electromagnetic device 40 and second electromagnetic device 50 operate as generators in a mid-range mode.
As shown in fig. 6 and table 1, the power-split coupled clutch 130 and the output brake 170 are engaged when the transmission 30 is configured in the mid mode. As shown in fig. 6, output brake 17 inhibits rotation of gear set 190 (e.g., gear 192, gear 194, gear 196, etc.). Thus, the output brake 170 rotationally fixes the ring gear 124. In one embodiment, engaging the output brake 170 substantially eliminates power droop between the output mode and the input mode of the transmission 30. According to the exemplary embodiment shown in fig. 6, the energy flow path for the mid-range mode comprises: engine 20 provides a rotational mechanical energy input to connecting shaft 36 that is delivered to ring gear 114; the ring gear 114 drives a plurality of planet gears 116 in rotation about their central axes and about the sun gear 112, causing both the carrier 118 and the sun gear 112 to rotate; and rotation of the carrier 118 drives the carrier 128, which carrier 128 rotates the plurality of planet gears 126 about their central axes and about the sun gear 122.
With ring gear 124 fixed by output brake 170, second electromagnetic device 50 may operate as a motor. In one embodiment, second electromagnetic device 50 receives electrical energy generated by first electromagnetic device 40. First electromagnetic device 40 operates as a generator, which removes rotational mechanical energy from sun gear 112. The sun gear 122 transmits a rotational mechanical torque to the plurality of planet gears 126 such that each planet gear 126 further rotates about the sun gear 122 (e.g., at an increased rotational speed, etc.). Rotation of the plurality of planet gears 126 (e.g., effected by the sun gear 122, etc.) drives the carrier 128, and thus the gear set 180. As shown in FIG. 6, power-split coupled clutch 130 couples gear set 180 to output shaft 32 such that the rotational mechanical energy of gear set 180 received from second electromagnetic device 50 drives the output shaft at the mid-range output speed, thereby enabling the vehicle to be driven at the mid-range output speed.
As shown in fig. 7, transmission 30 is selectively reconfigured into a high range mode of operation such that transmission 30 allows high output speed operation. In one embodiment, engine 20 provides a rotational mechanical energy input such that second electromagnetic device 50 generates electrical power while first electromagnetic device 40 uses the generated electrical power to provide a rotational mechanical energy input to transmission 30. It can be seen that engine 20 and first electromagnetic device 40 provide a rotational mechanical energy input to drive at least one of tires 62 and tires 72. In an alternative embodiment, first electromagnetic device 40 operates as a generator and second electromagnetic device 50 operates as a motor when transmission 30 is configured in the top-gear mode.
As shown in fig. 7 and table 1, power-split coupled clutch 130 and input coupled clutch 140 are engaged when transmission 30 is configured in the top gear mode. As shown in fig. 7, engagement of input coupling clutch 140 with connecting shaft 36 rotationally couples engine 20 and second electromagnetic device 50. For example, engine 20 may provide a rotational mechanical energy input to connecting shaft 36 such that second electromagnetic device 50 generates electrical energy. In one embodiment, first electromagnetic device 40 receives electrical energy generated by second electromagnetic device 50. First electromagnetic device 40 operates as a motor to provide a rotational mechanical energy input to sun gear 116 that drives the plurality of planet gears 116 and carrier 118.
Still referring to FIG. 7, power from the engine 20 is transferred to the ring gear 114 and the plurality of planet gears 116. Plurality of planet gears 116 are driven by both engine 20 (e.g., via ring gear 114, etc.) and first electromagnetic device 40 (e.g., via sun gear 112, etc.). The carrier 118 rotates, which drives the gear set 180. As shown in FIG. 7, power-split coupled clutch 130 couples gear set 180 to output shaft 32 such that the rotational mechanical energy provided by engine 20 and first electromagnetic device 40 drives the vehicle at a high gear speed.
As shown in fig. 8, transmission 30 is selectively reconfigured into an intermediate shift operating mode that facilitates shifting (i.e., shifting, changing modes, etc.) of transmission 30 between the intermediate and high operating modes. According to the embodiment shown in fig. 8, input coupling clutch 140, power split coupling clutch 130, and output clutch 170 are engaged when transmission 30 is selectively reconfigured into an intermediate shift mode of operation. According to an exemplary embodiment, the intermediate shift mode provides a smooth and robust shift strategy that functions reliably even under a wide variety of operating conditions when various types of oil are used as components of the transmission 30 and when valve non-linearities that may exist in one or more valves of the transmission 30 are experienced. The intermediate shift mode may provide zero inertia shifting through and across two or more overlapping gears (ranges) (e.g., mid and high, etc.). According to the exemplary embodiment shown in fig. 6-8, the intermediate shift mode eliminates the need to simultaneously disengage the output brake 170 and engage the input coupling clutch 140 to shift from the intermediate mode to the high mode (and vice versa). The mid-shift mode reduces the bump feeling associated with simultaneously disengaging the output brake 170 and engaging the input coupling clutch 140 to shift from a mid-to high gear, which provides smoother travel.
During operation, the mid shift mode may be used to shift from the mid to high mode or from the high mode to the mid mode. In one embodiment, transmission 30 is configured in a mid-range mode of operation with the power-split coupled clutch 130 and output brake 170 engaged, and in a high-range mode of operation with the power-split coupled clutch 130 and input coupled clutch 140 engaged. Transmission 30 may be selectively reconfigured to the intermediate shift mode in response to a difference between a rotational speed of second electromagnetic device 50 and a rotational speed of connecting shaft 36 and/or engine 20 falling below or equal to a threshold level (e.g., approximately zero, five revolutions per minute, fifty revolutions per minute, etc.). Transmission 30 may enter an intermediate shift mode when a rotational speed of second electromagnetic device 50 substantially corresponds to (e.g., matches, is substantially equal to, etc.) a rotational speed of connecting shaft 36 and/or engine 20. In one embodiment, transmission 30 enters an intermediate shift mode when second electromagnetic device 50 and the rotational speed of connecting shaft 36 and/or engine 20 is between 1600 and 1800 Revolutions Per Minute (RPM). For example, transmission 30 may enter an intermediate shift mode when second electromagnetic device 50 and connecting shaft 36 and/or engine 20 are rotating at approximately 1600 RPM. One or more sensors may be positioned to monitor a rotational speed of at least one of engine 20, connecting shaft 36, a portion of second electromagnetic device 50, or yet another component. A controller (e.g., controller 210, etc.) may reconfigure transmission 30 to the intermediate shift mode in response to sensing signals provided by one or more sensors.
A shift to the intermediate shift mode occurs when there is limited, if any, relative movement between the clutch plates of the input coupling clutch 140. The transmission 30 may be reconfigured into an intermediate shift mode (e.g., because torque is not removed from the output shaft 32, etc.) without compromising vehicle performance. The intermediate shift mode reduces (e.g., minimizes, etc.) heat generation and clutch wear during shifting by limiting relative movement between clutch plates of the input coupling clutch 140 when engaged. Thus, the intermediate shift mode may increase clutch life.
In operation, the vehicle may accelerate in a mid-range mode. In one embodiment, second electromagnetic device 50 provides an output torque in a mid-range operating mode such that its speed increases with the speed of the vehicle. As the speed of second electromagnetic device 50 continues to increase with vehicle speed, second electromagnetic device 50 may begin to operate at a similar rotational speed as connecting shaft 36 and/or engine 20. Controller 210 may engage input coupling clutch 140 to selectively reconfigure transmission 30 from the mid-range mode to the mid-shift mode. The vehicle may alternatively be decelerated in the high gear mode. In one embodiment, first electromagnetic device 40 operates as a motor in a high-speed mode of operation with a speed related to the speed of connecting shaft 36, engine 20, and/or the speed of the vehicle. The speed of the vehicle and/or the speed of first electromagnetic device 40 may be reduced to the speed specified for the mid range mode. Controller 210 may engage output brake 170 to selectively reconfigure transmission 30 from the high mode to the mid shift mode.
As shown in fig. 6-8, the power-split coupled clutch 130 is engaged (i.e., not disengaged, not opened, transferring torque, etc.) in each of the mid-range mode, the mid-shift mode, and the high-range mode. Engaging the transmission 30 in each of these modes by the power-split coupling clutch 130 facilitates continuous transfer of power from the engine 20 to the output shaft 32 during a shift from the mid-range mode to the high-range mode. According to an exemplary embodiment, engine 20 is also coupled to output shaft 32 via a power split coupling clutch 130 at a fixed ratio during the intermediate shift mode. Maintaining the power path to the output shaft 32 during a shift reduces (e.g., eliminates, etc.) the jerk associated with shifting a conventional transmission system. In the intermediate shift mode, acceleration of the engine 20 causes acceleration of the vehicle, and deceleration of the engine 20 causes deceleration of the vehicle. Powering the vehicle with the engine 20 during the shift event increases the overall efficiency of the drive system 100 by reducing the electrical power path during the shift event.
The transmission 30 may be configured in the intermediate shift mode for an extended period of time and/or when the vehicle traverses an extended distance. Controller 210 may selectively reconfigure transmission 30 to exit from the intermediate shift mode (e.g., enter a mid-range mode of operation, enter a high-range mode of operation, etc.) automatically in response to at least one of: elapsed shift time (e.g., elapsed time while in the intermediate shift mode, etc.), shift distance traveled (e.g., distance traveled by the vehicle while in the intermediate shift mode, etc.), changes in engine speed, and requests, among other conditions.
In one embodiment, controller 210 transitions transmission 30 away from the intermediate shift mode in response to the shift having satisfied an indication of at least one of a time-based and a distance-based condition. For one example, controller 210 may transition transmission 30 away from the intermediate shift mode in response to an indication that transmission 30 has been in the intermediate shift mode for longer than a predetermined period of time. As another example, controller 210 may transition transmission 30 away from the intermediate shift mode in response to an indication that the vehicle has traveled more than a threshold distance.
In another embodiment, controller 210 shifts transmission 30 away from the intermediate shift mode in response to a change in engine speed. Controller 210 may selectively reconfigure transmission 30 from the intermediate shift mode to the high range mode in response to an increase in engine speed (e.g., in response to the speed of engine 20 exceeding a threshold speed, etc.) (e.g., by disengaging output brake 170, etc.). For example, the vehicle may experience a downhill slope, which causes the engine speed to increase, thereby causing a shift to a high-speed mode of operation. As another example, the engine speed may be increased based on a command to cause an increase in engine speed (e.g., provided by an operator using an accelerator pedal or another input device, provided by a controller as part of autonomous operation of the vehicle, etc.).
Controller 210 may selectively reconfigure transmission 30 from the intermediate shift mode (e.g., by disengaging input coupling clutch 140, etc.) to the intermediate shift mode in response to a decrease in engine speed (e.g., in response to a decrease in speed of engine 20 below a threshold speed, etc.). For example, the vehicle may experience an uphill grade, which causes the engine speed to decrease, thereby causing a shift to a mid-range mode of operation. As another example, the engine speed may be reduced based on a command to cause a reduction in engine speed (e.g., provided by an operator using a brake pedal or another input device, provided by an operator releasing an accelerator pedal or another input device, provided by a controller as part of autonomous operation of the vehicle, etc.).
In yet another embodiment, controller 210 transitions transmission 30 away from the intermediate shift mode in response to a request. For example, the request may come from an operator (e.g., provided by way of a user interface, etc.) and indicate an operator command to enter either a mid-range mode of operation or a high-range mode of operation. The request may also be provided by a controller that is part of the autonomous operation of the vehicle. Such a request may be provided for re-entering the operating mode by which the vehicle is operating more efficiently. Such a request may prompt the transmission 30 to complete a shift from the mid-range mode of operation to the high-range mode of operation, a shift from the high-range mode of operation to the mid-range mode of operation, a switch from the mid-range mode back to the mid-range mode of operation, and/or a switch from the mid-range mode back to the high-range mode of operation.
In some embodiments, the transmission is selectively reconfigured from one of the mid-range mode and the high-range mode to the mid-range shift mode and then selectively reconfigured back to the previous mode (e.g., mid-range mode to mid-range shift mode to mid-range mode, etc.). For example, transmission 30 may be reconfigured from the mid-range mode to the mid-shift mode in response to second electromagnetic device 50 and engine 20 having a speed differential below a threshold level. The operator may keep the engine 20 running at approximately the same speed for a period of time, drive the output shaft 32 with the engine 20, and then release the accelerator pedal, whereby the transmission 30 may return to the mid-range mode. In one embodiment, first electromagnetic device 40 generates electrical power in the intermediate shift mode. Second electromagnetic device 50 may provide output torque to output shaft 32 during the intermediate shift mode. In another embodiment, second electromagnetic device 50 generates electrical power in the intermediate shift mode. First electromagnetic device 40 may provide an output torque to output shaft 32 during the intermediate shift mode. In yet another embodiment, neither or both of first electromagnetic device 40 and second electromagnetic device 50 generate electrical power and/or provide output torque during the intermediate shift mode.
As shown in fig. 9, the transmission 30 is selectively reconfigured into the reverse low range operating mode. In one embodiment, engine 20 provides a rotational mechanical energy input to transmission 30 such that first electromagnetic device 40 generates electrical power and second electromagnetic device 50 uses the generated electrical power to provide a rotational mechanical energy input to transmission 30. It can be seen that engine 20 and second electromagnetic device 50 provide a rotational mechanical energy input that drives at least one of tires 62 and tires 72 in opposite directions (e.g., rearward, etc.). In an alternative embodiment, first electromagnetic device 40 operates as a motor and second electromagnetic device 50 operates as a generator when transmission 30 is configured in the reverse low speed mode.
As shown in fig. 9 and table 1, power-split coupled clutch 130 and output coupled clutch 150 are engaged when transmission 30 is configured in reverse low mode. As shown in FIG. 9, the reverse Low mode is substantially similar to the reverse Low mode of FIG. 5 in that: the power split coupling clutch 130 and the output coupling clutch 150 couple both the gear set 180 and the gear set 190 to the output shaft 32. In reverse Low mode, second electromagnetic device 50 may provide a rotational mechanical energy input to transmission 30 in an opposite direction as compared to the reverse Low mode of FIG. 5.
As shown in fig. 10, transmission 30 is selectively reconfigured into a reverse-high operating mode such that transmission 30 allows reverse-high output speed operation. In one embodiment, engine 20 provides a rotational mechanical energy input such that first electromagnetic device 40 generates electrical power and second electromagnetic device 50 uses the generated electrical power to provide a rotational mechanical energy input to transmission 30. It can be seen that second electromagnetic device 50 provides a rotational mechanical energy input that drives at least one of tires 62 and tires 72. In an alternative embodiment, second electromagnetic device 50 operates as a generator and first electromagnetic device 40 operates as a motor when transmission 30 is configured in the reverse speed mode. In yet another alternative embodiment, both first electromagnetic device 40 and second electromagnetic device 50 operate as generators in the reverse speed mode.
As shown in fig. 10 and table 1, the split coupled clutch 130 and the output brake 170 are engaged when the transmission 30 is configured in reverse speed mode. As shown in fig. 10, output brake 17 inhibits rotation of gear set 190 (e.g., gear 192, gear 194, gear 196, etc.). Thus, the output brake 170 rotationally fixes the ring gear 124. According to the exemplary embodiment shown in FIG. 10, the energy flow path for the reverse speed mode includes: engine 20 provides a rotational mechanical energy input to connecting shaft 36 that is delivered to ring gear 114; and the ring gear 114 drives the plurality of planet gears 116 to rotate about their central axes and about the sun gear 112, causing both the carrier 118 and the sun gear 112 to rotate.
Still referring to FIG. 10, rotation of the carrier 118 drives the carrier 128, which rotates the plurality of planet gears 126 about their central axes, as well as about the sun gear 122. With ring gear 124 fixed by output brake 170, second electromagnetic device 50 may operate as a motor. In one embodiment, second electromagnetic device 50 receives electrical energy generated by first electromagnetic device 40. Thus, first electromagnetic device 40 operates as a generator, which removes rotational mechanical energy from sun gear 112. The sun gear 122 transmits a rotational mechanical torque to the plurality of planet gears 126 such that each planet gear 126 further rotates about the sun gear 122 (e.g., at an increased rotational speed, etc.). Rotation of the plurality of planet gears 126 (e.g., effected by the sun gear 122) drives the carrier 128, and thus the gear set 180. As shown in fig. 10, power-split coupled clutch 130 couples gear set 180 to output shaft 32 such that the rotational mechanical energy of gear set 180 received from second electromagnetic device 50 drives the output shaft at a high reverse output speed, thereby making it possible to drive the vehicle at the high reverse output speed.
According to an alternative embodiment, the engine 20 does not provide a rotational mechanical energy input to drive the vehicle. For example, first electromagnetic device 40, second electromagnetic device 50, and/or another device may store energy during the above-referenced operational modes. When sufficient energy is stored (e.g., above a threshold level, etc.), at least one of first electromagnetic device 40 and second electromagnetic device 50 may provide a rotational mechanical energy input to transmission 30 such that the vehicle is driven without input from engine 20 (e.g., an electric mode, etc.).
Although this specification may discuss method steps in a particular order, the order of the steps may differ from that which is outlined. Also, two or more steps may be performed simultaneously or partially simultaneously. Such variations will depend on the software and hardware system chosen and on designer choice. All such variations are within the scope of the present disclosure. Also, in contrast, software implementations could be accomplished with standard programming techniques with rule based logic and other logic to accomplish the various connection steps, processing steps, comparison steps and decision steps.
As used herein, the terms "approximately," "about," "approximately," and similar terms are intended to have a broad meaning consistent with the ordinary and accepted usage by those of ordinary skill in the art to which the subject matter of this disclosure pertains. Those skilled in the art who review this disclosure will appreciate that these terms are intended to allow description of the specific features described and claimed without limiting the scope of these features to the precise numerical ranges provided. Accordingly, these terms should be interpreted as indicating that insubstantial or insignificant modifications or variations of the described and claimed subject matter are considered within the scope of the invention as recited in the appended claims.
It should be noted that the term "exemplary" as used herein to describe various embodiments is intended to indicate that such embodiments are possible examples, representations, and/or illustrations of possible embodiments (and such term is not intended to imply that such embodiments must be uncommon or the best-shown examples).
The terms "coupled," "connected," and the like as used herein mean that two members are directly or indirectly joined to each other. Such engagement may be fixed (e.g., permanent, etc.) or movable (e.g., removable, releasable, etc.). Such joining may be achieved with the two members or the two members and any additional intermediate members being integrally formed as a single unitary body with one another or with the two members or the two members and any additional intermediate members being attached to one another.
References herein to the position of elements (e.g., "top," "bottom," "above," "below," "between," etc.) are merely used to describe the orientation of various elements within the figures. It should be noted that the orientation of the various elements may differ according to other exemplary embodiments, and such variations are intended to be encompassed by the present disclosure.
It is important to note that the construction and arrangement of the electro-mechanical variable transmission as shown in the exemplary embodiments is illustrative only. Although only a few embodiments of the present disclosure have been described in detail, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited. For example, elements shown as integrally formed may be constructed of multiple parts or elements. It should be noted that the elements and/or assemblies of the components described herein may be constructed from any of a variety of materials that provide sufficient strength or durability, in any of a variety of colors, textures, and combinations. Accordingly, all such modifications are intended to be included within the scope of this invention. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the preferred and other exemplary embodiments without departing from the scope of the present disclosure or the spirit of the appended claims.

Claims (16)

1. A vehicle, comprising:
an engine;
a drive axle;
a multi-mode transmission selectively coupled to the engine and the transaxle, the multi-mode transmission comprising:
a first gear set having a first planet gear carrier and a second gear set having a second planet gear carrier, wherein the first gear set is coupled to the engine, and wherein the first planet gear carrier and the second planet gear carrier are rotationally coupled;
a first motor/generator coupled to the first gear set; and
a second motor/generator electrically coupled to the first motor/generator with a bus, coupled to the second gear set, and selectively coupled to the engine;
a brake positioned to selectively restrict rotational movement of a ring gear of the second gear set when engaged;
a clutch selectively rotationally coupling the second motor/generator to the engine when engaged; and
a controller coupled to the multi-mode transmission and configured to selectively configure the multi-mode transmission in an active neutral start mode of operation in response to an engine start request by: engaging the clutch and the brake such that at least one of the first motor/generator and the second motor/generator produces a voltage that is applied to the bus.
2. The vehicle of claim 1, wherein the controller is configured to activate the first and second motor/generators to a desired state and disengage at least one of the clutch and the brake in response to at least one of the first and second motor/generators achieving at least one of: (a) a threshold speed is reached; (b) generating a threshold voltage; (c) generating a threshold voltage for a threshold time period; and (d) generating a threshold power.
3. The vehicle of claim 1, wherein the controller is configured to activate the first and second motor/generators to a desired state and maintain engagement of the clutch and the brake in response to the first motor/generator achieving at least one of: (a) a threshold speed is reached; (b) generating a threshold voltage; (c) generating a threshold voltage for a threshold time period; and (d) generating a threshold power.
4. The vehicle of claim 1, wherein the engine is coupled to the first ring gear of the first gear set with a connecting shaft, and wherein the second motor/generator is coupled to the sun gear of the second gear set such that the engine rotates the sun gear of the first gear set according to a fixed ratio when the brake and the clutch are engaged.
5. The vehicle of claim 1, wherein the engine is isolated from the transaxle when the multi-mode transmission is selectively configured in the active neutral start mode of operation.
6. The vehicle of claim 1, wherein the engine start request includes an indication to transition the engine from an "off state to an" on "state.
7. The vehicle of claim 6, further comprising at least one of a push button, a graphical user interface, and an ignition switch with which a user interacts to provide the engine start request.
8. A drive system for a vehicle having a drive axle, the drive system comprising:
a first gear set, the first gear set comprising: a first sun gear; a first ring gear; a plurality of first planet gears coupling the first sun gear to the first ring gear; and a first carrier that rotatably supports the plurality of first planetary gears;
a second gear set, the second gear set comprising: a second sun gear; a second ring gear; a plurality of second planet gears coupling the second sun gear to the second ring gear; and a second carrier rotationally supporting the plurality of second planet gears, wherein the first carrier is directly coupled to the second carrier;
a first motor coupled to the first gear set;
a second electric machine coupled to the second gear set;
a connecting shaft coupling an engine to the first gear set;
a brake positioned to selectively restrict rotational movement of the second ring gear when engaged;
a clutch selectively rotationally coupling the second electric machine to the connecting shaft and the engine when engaged; and
a controller configured to engage the clutch and the brake in response to an engine start request,
wherein the content of the first and second substances,
the drive system being selectively reconfigurable into an active neutral start mode of operation in response to a rotational input from the engine, whereby at least one of the first and second electric machines provides starting power; and is
At least one of the first and second electric machines is actuatable to a desired operating state in response to the starting power exceeding a threshold level.
9. The drive system of claim 8, wherein the controller is configured to disengage at least one of the clutch and the brake in response to the launch power exceeding the threshold level.
10. The drive system of claim 8, wherein the controller is configured to maintain engagement of the clutch and the brake in response to the launch power exceeding the threshold level.
11. The drive system of claim 8, wherein the engine start request includes an indication to transition the engine from an "off state to an" on "state.
12. The drive system of claim 8, wherein the engine is coupled to the first ring gear of the first gear set with the connecting shaft, and wherein the second electric machine is coupled to the second sun gear of the second gear set such that the engine rotates the first sun gear of the first gear set according to a fixed ratio when the brake and the clutch are engaged.
13. The drive system of claim 8, wherein the engine is isolated from the drive axle when the drive system is selectively configured in the active neutral start mode of operation.
14. The drive system of claim 8, wherein the first electric machine includes a first shaft and the second electric machine includes a second shaft, wherein the first shaft and the second shaft are radially aligned with the first gear set, the second gear set, and the connecting shaft.
15. The drive system of claim 8, wherein the first and second gear sets are disposed between the first and second electric machines.
16. A method of operating a multi-mode transmission, the method comprising the steps of:
receiving an engine start request associated with an engine, wherein the engine is coupled to a first electromagnetic device via a first gear set;
engaging a clutch to selectively rotationally couple a second electromagnetic device and a second gear set to the engine;
engaging a brake to selectively restrict rotational movement of a ring gear of the second gear set, wherein a carrier of the second gear set is coupled to a carrier of the first gear set;
generating a starting power by providing a rotational input to the first electromagnetic device with the engine; and
activating, with a controller, at least one of the first electromagnetic device and the second electromagnetic device to a desired operating state in response to the startup power exceeding a threshold level.
CN201680037843.6A 2015-07-06 2016-06-21 Vehicle, drive system for vehicle and method for operating multi-mode transmission Expired - Fee Related CN107709073B (en)

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US14/792,532 US9650032B2 (en) 2015-02-17 2015-07-06 Multi-mode electromechanical variable transmission
PCT/US2016/038586 WO2017007599A1 (en) 2015-07-06 2016-06-21 Vehicle, drive system for a vehicle and method of operating a multi-mode transmission

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