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US20210188076A1 - Electromechanical variable transmission - Google Patents

Electromechanical variable transmission Download PDF

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Publication number
US20210188076A1
US20210188076A1 US17/101,837 US202017101837A US2021188076A1 US 20210188076 A1 US20210188076 A1 US 20210188076A1 US 202017101837 A US202017101837 A US 202017101837A US 2021188076 A1 US2021188076 A1 US 2021188076A1
Authority
US
United States
Prior art keywords
gear set
gear
planetary gear
motor
generator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US17/101,837
Inventor
Jon Morrow
Dave Steinberger
Eric Braun
Andrew Kotloski
Nader Nasr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oshkosh Defense LLC
Original Assignee
Oshkosh Defense LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oshkosh Defense LLC filed Critical Oshkosh Defense LLC
Priority to US17/101,837 priority Critical patent/US20210188076A1/en
Assigned to OSHKOSH DEFENSE, LLC reassignment OSHKOSH DEFENSE, LLC MERGER (SEE DOCUMENT FOR DETAILS). Assignors: OSHKOSH CORPORATION
Assigned to OSHKOSH CORPORATION reassignment OSHKOSH CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KOTLOSKI, ANDREW, MORROW, JON, NASR, NADER, STEINBERGER, DAVID
Publication of US20210188076A1 publication Critical patent/US20210188076A1/en
Abandoned legal-status Critical Current

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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
    • B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
    • B60K6/52—Driving a plurality of drive axles, e.g. four-wheel drive
    • 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
    • B60K6/42—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
    • B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
    • B60K6/54—Transmission for changing ratio
    • B60K6/543—Transmission for changing ratio the transmission being a continuously variable transmission
    • 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
    • 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
    • F16H37/065—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 a plurality of driving or driven shafts
    • 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
    • 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
    • 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
    • F16H37/10—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 at both ends of intermediate shafts
    • F16H2037/102—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 at both ends of intermediate shafts the input or output shaft of the transmission is connected or connectable to two or more differentials
    • 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
    • F16H37/10—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 at both ends of intermediate shafts
    • F16H2037/105—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 at both ends of intermediate shafts characterised by number of modes or ranges, e.g. for compound gearing
    • F16H2037/106—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 at both ends of intermediate shafts characterised by number of modes or ranges, e.g. for compound gearing with switching means to provide two variator modes or 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
    • F16H2200/2002—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears
    • F16H2200/201—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears with three sets of orbital gears
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S903/00—Hybrid electric vehicles, HEVS
    • Y10S903/902—Prime movers comprising electrical and internal combustion motors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S903/00—Hybrid electric vehicles, HEVS
    • Y10S903/902—Prime movers comprising electrical and internal combustion motors
    • Y10S903/903—Prime movers comprising electrical and internal combustion motors having energy storing means, e.g. battery, capacitor
    • Y10S903/904—Component specially adapted for hev
    • Y10S903/909—Gearing
    • Y10S903/91—Orbital, e.g. planetary gears
    • Y10S903/911—Orbital, e.g. planetary gears with two or more gear sets

Definitions

  • the present disclosure relates generally to the field of transmissions for vehicles. More specifically, the present disclosure relates to the field of electromechanical infinitely variable transmissions for vehicles.
  • One exemplary embodiment relates to a drive train for a vehicle, the drive train including a first gear set including a sun gear, a ring gear and planetary gears coupling the sun gear to the ring gear, a second gear set including a sun gear, a ring gear and planetary gears coupling the sun gear to the ring gear, a first motor/generator coupled to the first gear set, a second motor/generator coupled to the second gear set, and at least one of (a) a first clutch that selectively engages the second motor/generator with the first gear set and (b) a second clutch that selectively engages the ring gear of the second gear set with the planetary gear carrier of at least one of the first gear set and the second gear set.
  • the planetary gears of both sets are rotatably supported by respective planetary gear carriers.
  • Another exemplary embodiment relates to a drive train for a vehicle, the drive train including a first planetary gear set, a second planetary gear set directly attached to the first planetary gear set, an output shaft coupled to at least one of the first and the second planetary gear sets and radially offset from the first and second planetary gear sets, a first electromagnetic device directly coupled to the first planetary gear set, and a second electromagnetic device coupled to the second planetary gear set and selectively rotationally engaged with the first planetary gear set.
  • Another exemplary embodiment relates to a vehicle including a transmission including a first gear set having a first planetary gear carrier and a second gear set having a second planetary gear carrier, a first motor/generator coupled to the first gear set, and a second motor/generator coupled to the second gear set.
  • a transmission including a first gear set having a first planetary gear carrier and a second gear set having a second planetary gear carrier, a first motor/generator coupled to the first gear set, and a second motor/generator coupled to the second gear set.
  • FIG. 1 is a schematic view of drive train for a vehicle according to an exemplary embodiment.
  • FIG. 2 is a detailed schematic view of the drive train shown in FIG. 1 according to an exemplary embodiment.
  • FIG. 3 is a schematic diagram of a control system for the drive train shown in FIG. 1 according to an exemplary embodiment.
  • FIG. 1 a schematic view of a drive train for a vehicle V 1 is shown according to an exemplary embodiment.
  • vehicle V 1 may be a work or commercial vehicle, a military vehicle, or any other type of vehicle.
  • the drive train includes an engine E 1 coupled to a transmission T 1 .
  • the vehicle V 1 also includes a first electromagnetic device EM 1 coupled to the transmission T 1 and a second electromagnetic device EM 2 coupled to the transmission T 1 .
  • the vehicle V 1 also includes at least one drive axle (such as, e.g., rear axle RA 1 and/or front axle FA 1 ) coupled to the transmission T 1 .
  • the engine E 1 is configured to provide rotational mechanical energy to the transmission T 1 .
  • the engine E 1 may be any source of rotational mechanical energy which is derived from a stored energy source such as a liquid or gaseous fuel. Examples are an internal combustion engine (such as a gas, natural gas, or diesel powered engine), turbine, fuel cell, electric motor or any other type of motor capable of providing rotational mechanical energy to the transmission T 1 .
  • the engine E 1 is a twelve liter diesel engine capable of providing approximately 400 to 600 horsepower, 400-1500 ft-lbs of torque, and has a rotational speed of approximately 0 to 2100 rpm.
  • the engine E 1 is operated at a relatively constant speed (such as, e.g., 1600 rpm) to maximize fuel efficiency.
  • the electromagnetic devices EM 1 , EM 2 are electric motor/generator devices that are capable of providing rotational electrical energy (as an electric motor) and/or capable of producing electrical power (as a generator).
  • the electromagnetic devices EM 1 , EM 2 provide electric power to one another, depending on the specific mode of operation of the vehicle V 1 .
  • the first electromagnetic device EM 1 may be operated as a generator to provide electric power to the second electromagnetic device EM 2 .
  • the second electromagnetic device EM 2 may be operated as a generator to provide electric power to the first electromagnetic device EM 1 .
  • the first electromagnetic device EM 1 and the second electromagnetic device EM 2 may be the same (or similar) to one another. However, according to other exemplary embodiments, the first electromagnetic device EM 1 and the second electromagnetic device EM 2 may be sized differently as required by a particular application. According to one exemplary embodiment, the electromagnetic devices EM 1 , EM 2 are each capable of providing up to approximately 300 horsepower and 1300 ft-lbs of torque and are capable of rotational speeds from approximately ⁇ 6,000 to 6,000 rpm (i.e., both forward and reverse from 0 to 6,000 rpm).
  • the transmission T 1 is coupled to at least one drive axle of the vehicle V 1 (such as, e.g., rear axle RA 1 and/or front axle FA 1 as shown in FIG. 1 ).
  • both the rear axle RA 1 and the front axle FA 1 are driven by the transmission T 1 .
  • only one of the axles may be driven by the transmission T 1 .
  • additional axles e.g., such as additional rear axles not shown
  • each of the axles are coupled to the transmission via a differential gear set (such as, e.g., rear differential RD 1 and/or front differential FD 1 shown in FIG. 1 ).
  • Each axle is configured to drive (i.e., provide rotational energy to) one or more wheels/tires to propel (e.g., move, push, drive etc.) the vehicle V 1 .
  • the transmission T 1 includes two planetary gear sets.
  • the transmission T 1 includes a first planetary gear set P 1 and a second planetary gear set P 2 .
  • a third planetary gear set P 3 is provided as a torque divider (e.g., 30% torque to the front and 70% torque to the rear) if both the front and rear vehicle axles are powered.
  • the first planetary gear set P 1 is configured as a power split device or power splitting planetary gear set
  • the second planetary gear set P 2 is configured as a gear reduction device
  • the third planetary gear set P 3 is configured as a torque proportioning device.
  • the first planetary gear set P 1 is coupled to the engine E 1 , the first electromechanical device EM 1 , the second electromechanical device EM 2 (via the second planetary gear set P 2 ), and to gear G 5 .
  • the second planetary gear set P 2 is also coupled to the gear G 5 (via gears G 13 , G 14 , G 15 , clutch C 2 and shaft S 6 ).
  • the engine E 1 is coupled to a clutch C 3 that is configured to selectively rotationally engage/disengage the engine E 1 with the transmission T 1 .
  • the clutch C 3 may be any type of clutch capable of rotationally fixing the engine E 1 to the transmission T 1 .
  • the clutch C 3 When the clutch C 3 is engaged, the engine E 1 is coupled to a shaft S 1 .
  • a gear G 6 is coupled (e.g., rotationally fixed) to shaft S 1 and engages a gear G 7 that is coupled (e.g., rotationally fixed) to a shaft S 2 .
  • the gear G 7 in turn is coupled to the first planetary gear set P 1 via the shaft S 2 .
  • the first planetary gear set P 1 comprises an annulus or ring gear G 1 which is coupled to the shaft S 2 .
  • the clutch C 3 , the gears G 6 and G 7 , and the shaft S 2 cooperate to permit engine E 1 to drive the ring gear G 1 .
  • the ring gear G 1 is engaged with at least one planetary gear G 2 (e.g., one, two, three, four or more planetary gears G 2 that are coupled to one another (e.g., rotatably supported) by a planetary gear carrier PGC 1 ).
  • the planetary gear(s) G 2 are engaged with a sun gear G 3 of the first planetary gear set P 1 to couple the ring gear G 1 to the sun gear G 3 .
  • the sun gear G 3 is directly coupled to the first electromagnetic device EM 1 by a shaft S 3 .
  • the first electromagnetic device EM 1 may be coupled to an optional brake B 1 by a clutch C 4 .
  • the clutch C 4 may be any type of clutch capable of rotationally fixing the first electromagnetic device EM 1 to the brake B 1 .
  • the effect of braking the first electromechanical device EM 1 is to fix or hold sun gear G 3 without the need to apply electrical energy to the first electromechanical device EM 1 to cause the first electromechanical device EM 1 to generate enough holding torque to hold the gear G 3 from rotating.
  • the planetary gear carrier PGC 1 is coupled to a carrier gear G 4 .
  • the carrier gear G 4 is engaged with a gear G 5 .
  • the gear G 5 is part of the third planetary gear set P 3 used to divide the power from the transmission T 1 to the front and rear axles.
  • the gear G 5 is coupled to the planetary gears of the third planetary gear set P 3 . If only a single axle is driven by the transmission T 1 , or a different transfer device is used to drive more than one axle, the third planetary gear set P 3 may not be necessary.
  • the carrier gear G 4 is also coupled to the second planetary gear set P 2 by a shaft S 5 (as will be described in more detail below).
  • the transmission T 1 also includes a clutch C 1 that selectively rotationally engages/disengages the engine E 1 to the second electromagnetic device EM 2 .
  • the clutch C 1 may be any type of clutch capable of rotationally fixing the engine E 1 to the second electromagnetic device EM 2 , such as a wet clutch.
  • the clutch C 1 is coupled to the engine E 1 by the shaft S 1 .
  • the shaft S 1 is coupled to a gear G 9 .
  • the gear G 9 in turn is engaged with a gear G 8 that is coupled to the second electromagnetic device EM 2 .
  • the engine is coupled to the second electromagnetic device EM 2 to allow the second electromagnetic device EM 2 to be driven as a generator (e.g., to provide electrical power to the first electromagnetic device EM 1 ).
  • the electromagnetic device EM 2 is also coupled to the second planetary gear set P 2 by a shaft S 4 .
  • the shaft S 4 is connected to a sun gear G 12 of the second planetary gear set P 2 .
  • the sun gear G 12 is engaged with at least one planetary gear G 11 (e.g., one, two, three, four or more planetary gears G 11 that are coupled to one another (e.g., rotatably supported) by a planetary gear carrier PGC 2 ).
  • the planetary gear(s) G 11 in turn are engaged with an annulus or ring gear G 10 to couple the sun gear G 12 to the ring gear G 10 .
  • the planet gear carrier PGC 2 of the second planetary gear P 2 is coupled to the carrier gear G 4 (and the planet gear carrier PGC 1 ) of the first planetary gear set P 1 by a shaft S 5 .
  • the planet gear carrier PGC 1 and the planet gear carrier PGC 2 are coupled to one another so that the second electromagnetic device EM 2 is coupled to the first planetary gear set Pb via the second planetary gear set P 2 .
  • the second electromagnetic device EM 2 is also coupled to the third planetary gear set P 3 via the second planetary gear set P 2 .
  • the ring gear G 10 of the second planetary gear P 2 is coupled to an output gear G 13 that is engaged with an idler gear G 14 .
  • the idler gear G 14 in turn is engaged with a gear G 15 that is selectively engaged/disengaged to the third planetary gear set P 3 by a clutch C 2 (via a shaft S 6 ).
  • the clutch C 2 may be any type of clutch capable of rotationally fixing the gear G 15 to the shaft S 6 , such as a wet clutch.
  • the third planetary gear set P 3 is a torque proportioning device for the front and rear axles of the vehicle V 1 . Torque is delivered from the third planetary gear set P 3 to the front axle FA 1 and/or the rear axle RA 1 via shafts S 7 and S 8 . As discussed above, in other exemplary embodiments, the third planetary gear set P 3 is not necessary when either the front axle FA 1 or rear axle RA 1 of the vehicle V 1 is not driven by the transmission T 1 .
  • the transmission T 1 is operated in a low speed mode (e.g., a vehicle speed of approximately 0-10 mph) by having the clutch C 2 engaged and the clutch C 1 disengaged.
  • the transmission T 1 is operated in a high speed mode (e.g., a vehicle speed of approximately 10-65 mph) by having the clutch C 1 engaged and the clutch C 2 disengaged.
  • the vehicle speeds in the low and high speed modes may vary higher or lower.
  • an operator e.g., driver of vehicle V 1 may manually switch the transmission T 1 from low speed mode to high speed mode or vice-versa.
  • the transmission T 1 is automatically switched from low speed mode to high speed mode (and vice-versa) by a control system (see, e.g., FIG. 3 ).
  • the control system may include various operator inputs (such as, e.g., desired vehicle speed, torque, traction, terrain, etc.) and also various system inputs (such as, e.g., current vehicle speed, engine speed, power, and torque, electromagnetic device speed, power, and torque, etc.). As shown in FIG.
  • control system is configured to monitor and/or control the engine, the mode of the transmission, the first electromagnetic device EM 1 , the second electromagnetic device EM 2 , the clutch C 1 , the clutch C 2 , and/or the clutch C 3 .
  • gears within the transmission T 1 are sized according to the specific application and desired performance characteristics of the vehicle V 1 .
  • the gears within the transmission T 1 have tooth counts as shown in Table 1 .
  • the tooth counts of the gears may vary more or less than that shown.
  • the engine E 1 , the electromagnetic devices EM 1 and EM 2 , the clutches C 1 -C 4 , and the shafts S 1 -S 8 may all vary according to the specific application and desired performance characteristics of the vehicle V 1 .
  • references to “front,” “rear,” “top,” and “base” in this description are merely used to identify various elements as are oriented in the FIGS., with “front” and “rear” being relative to the environment in which the device is provided.
  • the term “coupled” means the joining of two members directly or indirectly to one another. Such joining may be stationary or moveable in nature. 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. Such joining may be permanent in nature or may be removable or releasable in nature.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Structure Of Transmissions (AREA)
  • Hybrid Electric Vehicles (AREA)

Abstract

A drive train includes a first gear set including a sun gear, a ring gear and planetary gears coupling the sun gear to the ring gear, a second gear set including a sun gear, a ring gear and planetary gears coupling the sun gear to the ring gear, a first motor/generator coupled to the first gear set, a second motor/generator coupled to the second gear set, and at least one of (a) a first clutch that selectively engages the second motor/generator with the first gear set and (b) a second clutch that selectively engages the ring gear of the second gear set with the planetary gear carrier of at least one of the first gear set and the second gear set. The planetary gears of both sets are rotatably supported by respective planetary gear carriers.

Description

    CROSS-REFERENCE TO RELATED APPLICATIONS
  • This application is a continuation of U.S. application Ser. No. 16/592,167, filed Oct. 3, 2019, which is a continuation of U.S. application Ser. No. 16/042,680, filed Jul. 23, 2018, which is a continuation of U.S. application Ser. No. 15/247,907, filed Aug. 25, 2016, now U.S. Pat. No. 10,029,556, which is a continuation of U.S. application Ser. No. 14/514,210, filed Oct. 14, 2014, now U.S. Pat. No. 9,428,042, which is a continuation of U.S. application Ser. No. 13/686,678, filed Nov. 27, 2012, now U.S. Pat. No. 8,864,613, which is a continuation of U.S. application Ser. No. 12/820,928, filed Jun. 22, 2010, now U.S. Pat. No. 8,337,352, all of which are incorporated herein by reference in their entireties.
    • STATEMENT REGARDING FEDERALLY-SPONSORED RESEARCH OR DEVELOPMENT
  • The government of the United States has certain rights in this invention pursuant to Contract No. N00014-09-C-0601 awarded by the Office of Naval Research.
    • BACKGROUND
  • The present disclosure relates generally to the field of transmissions for vehicles. More specifically, the present disclosure relates to the field of electromechanical infinitely variable transmissions for vehicles.
    • SUMMARY
  • One exemplary embodiment relates to a drive train for a vehicle, the drive train including a first gear set including a sun gear, a ring gear and planetary gears coupling the sun gear to the ring gear, a second gear set including a sun gear, a ring gear and planetary gears coupling the sun gear to the ring gear, a first motor/generator coupled to the first gear set, a second motor/generator coupled to the second gear set, and at least one of (a) a first clutch that selectively engages the second motor/generator with the first gear set and (b) a second clutch that selectively engages the ring gear of the second gear set with the planetary gear carrier of at least one of the first gear set and the second gear set. The planetary gears of both sets are rotatably supported by respective planetary gear carriers.
  • Another exemplary embodiment relates to a drive train for a vehicle, the drive train including a first planetary gear set, a second planetary gear set directly attached to the first planetary gear set, an output shaft coupled to at least one of the first and the second planetary gear sets and radially offset from the first and second planetary gear sets, a first electromagnetic device directly coupled to the first planetary gear set, and a second electromagnetic device coupled to the second planetary gear set and selectively rotationally engaged with the first planetary gear set.
  • Another exemplary embodiment relates to a vehicle including a transmission including a first gear set having a first planetary gear carrier and a second gear set having a second planetary gear carrier, a first motor/generator coupled to the first gear set, and a second motor/generator coupled to the second gear set. During a first mode of operation of the vehicle the second motor/generator is disengaged from the first gear set. During a second mode of operation of the vehicle the second motor/generator is coupled to the first gear set.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a schematic view of drive train for a vehicle according to an exemplary embodiment.
  • FIG. 2 is a detailed schematic view of the drive train shown in FIG. 1 according to an exemplary embodiment.
  • FIG. 3 is a schematic diagram of a control system for the drive train shown in FIG. 1 according to an exemplary embodiment.
    •  DETAILED DESCRIPTION
  • Referring to FIG. 1, a schematic view of a drive train for a vehicle V1 is shown according to an exemplary embodiment. The vehicle V1 may be a work or commercial vehicle, a military vehicle, or any other type of vehicle.
  • According to an exemplary embodiment, the drive train includes an engine E1 coupled to a transmission T1. The vehicle V1 also includes a first electromagnetic device EM1 coupled to the transmission T1 and a second electromagnetic device EM2 coupled to the transmission T1. The vehicle V1 also includes at least one drive axle (such as, e.g., rear axle RA1 and/or front axle FA1) coupled to the transmission T1.
  • According to an exemplary embodiment, the engine E1 is configured to provide rotational mechanical energy to the transmission T1. The engine E1 may be any source of rotational mechanical energy which is derived from a stored energy source such as a liquid or gaseous fuel. Examples are an internal combustion engine (such as a gas, natural gas, or diesel powered engine), turbine, fuel cell, electric motor or any other type of motor capable of providing rotational mechanical energy to the transmission T1. According to one exemplary embodiment, the engine E1 is a twelve liter diesel engine capable of providing approximately 400 to 600 horsepower, 400-1500 ft-lbs of torque, and has a rotational speed of approximately 0 to 2100 rpm. According to one exemplary embodiment, the engine E1 is operated at a relatively constant speed (such as, e.g., 1600 rpm) to maximize fuel efficiency.
  • According to an exemplary embodiment, the electromagnetic devices EM1, EM2 are electric motor/generator devices that are capable of providing rotational electrical energy (as an electric motor) and/or capable of producing electrical power (as a generator). According to one exemplary embodiment, the electromagnetic devices EM1, EM2 provide electric power to one another, depending on the specific mode of operation of the vehicle V1. For example, the first electromagnetic device EM1 may be operated as a generator to provide electric power to the second electromagnetic device EM2. Alternatively, the second electromagnetic device EM2 may be operated as a generator to provide electric power to the first electromagnetic device EM1.
  • According to one exemplary embodiment, the first electromagnetic device EM1 and the second electromagnetic device EM2 may be the same (or similar) to one another. However, according to other exemplary embodiments, the first electromagnetic device EM1 and the second electromagnetic device EM2 may be sized differently as required by a particular application. According to one exemplary embodiment, the electromagnetic devices EM1, EM2 are each capable of providing up to approximately 300 horsepower and 1300 ft-lbs of torque and are capable of rotational speeds from approximately −6,000 to 6,000 rpm (i.e., both forward and reverse from 0 to 6,000 rpm).
  • According to an exemplary embodiment, the transmission T1 is coupled to at least one drive axle of the vehicle V1 (such as, e.g., rear axle RA1 and/or front axle FA1 as shown in FIG. 1). According to one exemplary embodiment, both the rear axle RA1 and the front axle FA1 are driven by the transmission T1. According to other exemplary embodiments, only one of the axles may be driven by the transmission T1. According to yet another exemplary embodiment, additional axles (e.g., such as additional rear axles not shown) may be driven by the transmission T1. According to an exemplary embodiment, each of the axles are coupled to the transmission via a differential gear set (such as, e.g., rear differential RD1 and/or front differential FD1 shown in FIG. 1). Each axle is configured to drive (i.e., provide rotational energy to) one or more wheels/tires to propel (e.g., move, push, drive etc.) the vehicle V1.
  • Referring now to FIG. 2, a detailed schematic view of the drive train for the vehicle V1 is shown according to exemplary embodiment. As shown in FIG. 2, the transmission T1 includes two planetary gear sets. According to an exemplary embodiment, the transmission T1 includes a first planetary gear set P1 and a second planetary gear set P2. A third planetary gear set P3 is provided as a torque divider (e.g., 30% torque to the front and 70% torque to the rear) if both the front and rear vehicle axles are powered.
  • According to one exemplary embodiment, the first planetary gear set P1 is configured as a power split device or power splitting planetary gear set, the second planetary gear set P2 is configured as a gear reduction device, and the third planetary gear set P3 is configured as a torque proportioning device. As shown in FIG. 2, the first planetary gear set P1 is coupled to the engine E1, the first electromechanical device EM1, the second electromechanical device EM2 (via the second planetary gear set P2), and to gear G5. The second planetary gear set P2 is also coupled to the gear G5 (via gears G13, G14, G15, clutch C2 and shaft S6).
  • As shown in FIG. 2, the engine E1 is coupled to a clutch C3 that is configured to selectively rotationally engage/disengage the engine E1 with the transmission T1. The clutch C3 may be any type of clutch capable of rotationally fixing the engine E1 to the transmission T1. When the clutch C3 is engaged, the engine E1 is coupled to a shaft S1. A gear G6 is coupled (e.g., rotationally fixed) to shaft S1 and engages a gear G7 that is coupled (e.g., rotationally fixed) to a shaft S2. The gear G7 in turn is coupled to the first planetary gear set P1 via the shaft S2.
  • As shown in FIG. 2, the first planetary gear set P1 comprises an annulus or ring gear G1 which is coupled to the shaft S2. As shown, the clutch C3, the gears G6 and G7, and the shaft S2 cooperate to permit engine E1 to drive the ring gear G1. The ring gear G1 is engaged with at least one planetary gear G2 (e.g., one, two, three, four or more planetary gears G2 that are coupled to one another (e.g., rotatably supported) by a planetary gear carrier PGC1). The planetary gear(s) G2 are engaged with a sun gear G3 of the first planetary gear set P1 to couple the ring gear G1 to the sun gear G3.
  • The sun gear G3 is directly coupled to the first electromagnetic device EM1 by a shaft S3. The first electromagnetic device EM1 may be coupled to an optional brake B1 by a clutch C4. The clutch C4 may be any type of clutch capable of rotationally fixing the first electromagnetic device EM1 to the brake B1. The effect of braking the first electromechanical device EM1 is to fix or hold sun gear G3 without the need to apply electrical energy to the first electromechanical device EM1 to cause the first electromechanical device EM1 to generate enough holding torque to hold the gear G3 from rotating.
  • According to an exemplary embodiment, the planetary gear carrier PGC1 is coupled to a carrier gear G4. The carrier gear G4 is engaged with a gear G5. In the preferred embodiment of vehicle V1, the gear G5 is part of the third planetary gear set P3 used to divide the power from the transmission T1 to the front and rear axles. In this embodiment, the gear G5 is coupled to the planetary gears of the third planetary gear set P3. If only a single axle is driven by the transmission T1, or a different transfer device is used to drive more than one axle, the third planetary gear set P3 may not be necessary.
  • The carrier gear G4 is also coupled to the second planetary gear set P2 by a shaft S5 (as will be described in more detail below).
  • Still referring to FIG. 2, the transmission T1 also includes a clutch C1 that selectively rotationally engages/disengages the engine E1 to the second electromagnetic device EM2. The clutch C1 may be any type of clutch capable of rotationally fixing the engine E1 to the second electromagnetic device EM2, such as a wet clutch.
  • As shown in FIG. 2, the clutch C1 is coupled to the engine E1 by the shaft S1. When the clutch C1 is engaged, the shaft S1 is coupled to a gear G9. The gear G9 in turn is engaged with a gear G8 that is coupled to the second electromagnetic device EM2. Thus, when the clutch C1 is engaged, the engine is coupled to the second electromagnetic device EM2 to allow the second electromagnetic device EM2 to be driven as a generator (e.g., to provide electrical power to the first electromagnetic device EM1).
  • The electromagnetic device EM2 is also coupled to the second planetary gear set P2 by a shaft S4. The shaft S4 is connected to a sun gear G12 of the second planetary gear set P2. The sun gear G12 is engaged with at least one planetary gear G11 (e.g., one, two, three, four or more planetary gears G11 that are coupled to one another (e.g., rotatably supported) by a planetary gear carrier PGC2). The planetary gear(s) G11 in turn are engaged with an annulus or ring gear G10 to couple the sun gear G12 to the ring gear G10.
  • According to an exemplary embodiment, the planet gear carrier PGC2 of the second planetary gear P2 is coupled to the carrier gear G4 (and the planet gear carrier PGC1) of the first planetary gear set P1 by a shaft S5. Thus, the planet gear carrier PGC1 and the planet gear carrier PGC2 are coupled to one another so that the second electromagnetic device EM2 is coupled to the first planetary gear set Pb via the second planetary gear set P2.
  • The second electromagnetic device EM2 is also coupled to the third planetary gear set P3 via the second planetary gear set P2. According to an exemplary embodiment, the ring gear G10 of the second planetary gear P2 is coupled to an output gear G13 that is engaged with an idler gear G14. The idler gear G14 in turn is engaged with a gear G15 that is selectively engaged/disengaged to the third planetary gear set P3 by a clutch C2 (via a shaft S6). The clutch C2 may be any type of clutch capable of rotationally fixing the gear G15 to the shaft S6, such as a wet clutch.
  • According to an exemplary embodiment, the third planetary gear set P3 is a torque proportioning device for the front and rear axles of the vehicle V1. Torque is delivered from the third planetary gear set P3 to the front axle FA1 and/or the rear axle RA1 via shafts S7 and S8. As discussed above, in other exemplary embodiments, the third planetary gear set P3 is not necessary when either the front axle FA1 or rear axle RA1 of the vehicle V1 is not driven by the transmission T1.
  • According to an exemplary embodiment, the transmission T1 is operated in a low speed mode (e.g., a vehicle speed of approximately 0-10 mph) by having the clutch C2 engaged and the clutch C1 disengaged. According to another exemplary embodiment, the transmission T1 is operated in a high speed mode (e.g., a vehicle speed of approximately 10-65 mph) by having the clutch C1 engaged and the clutch C2 disengaged. According to other various embodiments, the vehicle speeds in the low and high speed modes may vary higher or lower.
  • According to an exemplary embodiment, an operator (e.g., driver) of vehicle V1 may manually switch the transmission T1 from low speed mode to high speed mode or vice-versa. According to another exemplary embodiment, the transmission T1 is automatically switched from low speed mode to high speed mode (and vice-versa) by a control system (see, e.g., FIG. 3). The control system may include various operator inputs (such as, e.g., desired vehicle speed, torque, traction, terrain, etc.) and also various system inputs (such as, e.g., current vehicle speed, engine speed, power, and torque, electromagnetic device speed, power, and torque, etc.). As shown in FIG. 3, according to one exemplary embodiment, the control system is configured to monitor and/or control the engine, the mode of the transmission, the first electromagnetic device EM1, the second electromagnetic device EM2, the clutch C1, the clutch C2, and/or the clutch C3.
  • According to an exemplary embodiment, gears within the transmission T1 are sized according to the specific application and desired performance characteristics of the vehicle V1. According to one exemplary embodiment, the gears within the transmission T1 have tooth counts as shown in Table 1. However, according to other exemplary embodiments, the tooth counts of the gears may vary more or less than that shown. According to other exemplary embodiments, the engine E1, the electromagnetic devices EM1 and EM2, the clutches C1-C4, and the shafts S1-S8 may all vary according to the specific application and desired performance characteristics of the vehicle V1.
  • TABLE 1
    Tooth
    Gear # Count
    Gear
    1 81
    Gear 2 24
    Gear 3 33
    Gear 4 77
    Gear 5 77
    Gear 6 49
    Gear 7 50
    Gear 8 55
    Gear 9 74
    Gear 10 64
    Gear 11 19
    Gear 12 26
    Gear 13 28
    Gear 14 47
    Gear 15 82
  • It should be noted that references to “front,” “rear,” “top,” and “base” in this description are merely used to identify various elements as are oriented in the FIGS., with “front” and “rear” being relative to the environment in which the device is provided.
  • For the purpose of this disclosure, the term “coupled” means the joining of two members directly or indirectly to one another. Such joining may be stationary or moveable in nature. 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. Such joining may be permanent in nature or may be removable or releasable in nature.
  • It is important to note that the construction and arrangement of the electromechanical variable transmission as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (for example, 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 in the claims. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. Other substitutions, modifications, changes and omissions may also be made in the design, operating conditions and arrangement of the various exemplary embodiments without departing from the scope of the present embodiments.

Claims (20)

1. A drive train for a vehicle, comprising:
a first gear set comprising a sun gear, a ring gear and planetary gears coupling the sun gear to the ring gear;
a second gear set comprising a sun gear, a ring gear and planetary gears coupling the sun gear to the ring gear, wherein the planetary gears of both sets are rotatably supported by respective planetary gear carriers;
a first motor/generator coupled to the first gear set;
a second motor/generator coupled to the second gear set; and
at least one of:
a first clutch that selectively engages the second motor/generator with the first gear set; and
a second clutch that selectively engages the ring gear of the second gear set with the planetary gear carrier of at least one of the first gear set and the second gear set.
2. The drive train of claim 1, wherein at least one of the first gear set and the second gear set are at least selectively engaged with an output shaft of an engine.
3. The drive train of claim 1, further comprising a third gear set including at least two gears that couple the first clutch to the second motor/generator.
4. The drive train of claim 1, further comprising a brake mechanism configured to selectively prevent rotation of the first motor/generator.
5. The drive train of claim 4, further comprising a third clutch selectively coupling the brake mechanism to the first motor/generator.
6. The drive train of claim 1, wherein the drive train comprises the first clutch that selectively engages the second motor/generator with the first gear set.
7. The drive train of claim 6, wherein the first clutch selectively engages the second motor/generator with the ring gear of the first gear set.
8. The drive train of claim 1, wherein the drive train comprises the second clutch that selectively engages the ring gear of the second gear set with the planetary gear carrier of the at least one of the first gear set and the second gear set.
9. The drive train of claim 8, wherein the second clutch selectively engages the ring gear of the second gear set with the planetary gear carrier of the first gear set and the planetary gear carrier of the second gear set.
10. A drive train for a vehicle, comprising:
a first planetary gear set;
a second planetary gear set directly attached to the first planetary gear set;
an output shaft coupled to at least one of the first and the second planetary gear sets and radially offset from the first and second planetary gear sets;
a first electromagnetic device directly coupled to the first planetary gear set; and
a second electromagnetic device coupled to the second planetary gear set and selectively rotationally engaged with the first planetary gear set.
11. The drive train of claim 10, wherein the first and second electromagnetic devices are aligned.
12. The drive train of claim 10, wherein at least one of the first electromagnetic device and the second electromagnetic device comprises a motor/generator.
13. The drive train of claim 10, wherein the first and second planetary gear sets are aligned.
14. The drive train of claim 10, wherein the first planetary gear set includes a first planetary gear carrier, and wherein the second planetary gear set includes a second planetary gear carrier that is fixed to the first planetary gear carrier.
15. A vehicle, comprising:
a transmission comprising a first gear set having a first planetary gear carrier and a second gear set having a second planetary gear carrier;
a first motor/generator coupled to the first gear set; and
a second motor/generator coupled to the second gear set;
wherein during a first mode of operation of the vehicle the second motor/generator is disengaged from the first gear set, and
wherein during a second mode of operation of the vehicle the second motor/generator is coupled to the first gear set.
16. The vehicle of claim 15, wherein during the second mode of operation, the second motor/generator is coupled to an output shaft of an engine.
17. The vehicle of claim 15, wherein the first planetary gear carrier is coupled to the second planetary gear carrier.
18. The vehicle of claim 15, wherein the transmission further comprises a third gear set that is coupled to a drive axle of the vehicle.
19. The vehicle of claim 15, wherein the first motor/generator and the second motor/generator are aligned.
20. The vehicle of claim 15, wherein the first planetary gear carrier and the second planetary gear carrier are aligned.
US17/101,837 2010-06-22 2020-11-23 Electromechanical variable transmission Abandoned US20210188076A1 (en)

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US12/820,928 US8337352B2 (en) 2010-06-22 2010-06-22 Electromechanical variable transmission
US13/686,678 US8864613B2 (en) 2010-06-22 2012-11-27 Electromechanical variable transmission
US14/514,210 US9428042B2 (en) 2010-06-22 2014-10-14 Electromechanical variable transmission
US15/247,907 US10029556B2 (en) 2010-06-22 2016-08-25 Electromechanical variable transmission
US16/042,680 US10457134B2 (en) 2010-06-22 2018-07-23 Electromechanical variable transmission
US16/592,167 US10843549B2 (en) 2010-06-22 2019-10-03 Electromechanical variable transmission
US17/101,837 US20210188076A1 (en) 2010-06-22 2020-11-23 Electromechanical variable transmission

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US14/514,210 Active 2030-06-25 US9428042B2 (en) 2010-06-22 2014-10-14 Electromechanical variable transmission
US15/247,907 Active 2030-06-23 US10029556B2 (en) 2010-06-22 2016-08-25 Electromechanical variable transmission
US16/042,680 Active US10457134B2 (en) 2010-06-22 2018-07-23 Electromechanical variable transmission
US16/592,167 Active US10843549B2 (en) 2010-06-22 2019-10-03 Electromechanical variable transmission
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US14/514,210 Active 2030-06-25 US9428042B2 (en) 2010-06-22 2014-10-14 Electromechanical variable transmission
US15/247,907 Active 2030-06-23 US10029556B2 (en) 2010-06-22 2016-08-25 Electromechanical variable transmission
US16/042,680 Active US10457134B2 (en) 2010-06-22 2018-07-23 Electromechanical variable transmission
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US8864613B2 (en) 2014-10-21
US20200039341A1 (en) 2020-02-06
US20180345783A1 (en) 2018-12-06
US20160361987A1 (en) 2016-12-15
WO2011163135A2 (en) 2011-12-29
US20150283894A1 (en) 2015-10-08
US20130196806A1 (en) 2013-08-01
US8337352B2 (en) 2012-12-25
US9428042B2 (en) 2016-08-30
US10843549B2 (en) 2020-11-24
US10029556B2 (en) 2018-07-24
WO2011163135A3 (en) 2012-02-16
US20110312459A1 (en) 2011-12-22
US10457134B2 (en) 2019-10-29

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