WO2017075225A1 - Configurations de groupe motopropulseur multimode dotées de transmission à variation de vitesse continue munie de variateur à bille, utilisées comme répartition de puissance - Google Patents

Configurations de groupe motopropulseur multimode dotées de transmission à variation de vitesse continue munie de variateur à bille, utilisées comme répartition de puissance Download PDF

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Publication number
WO2017075225A1
WO2017075225A1 PCT/US2016/059131 US2016059131W WO2017075225A1 WO 2017075225 A1 WO2017075225 A1 WO 2017075225A1 US 2016059131 W US2016059131 W US 2016059131W WO 2017075225 A1 WO2017075225 A1 WO 2017075225A1
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WO
WIPO (PCT)
Prior art keywords
clutch
rotatable shaft
coupled
continuously variable
variable transmission
Prior art date
Application number
PCT/US2016/059131
Other languages
English (en)
Inventor
Joseph S. Vanselous
Shaun E. Mepham
Sebastian J. PETERS
Original Assignee
Dana Limited
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Filing date
Publication date
Application filed by Dana Limited filed Critical Dana Limited
Publication of WO2017075225A1 publication Critical patent/WO2017075225A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
    • F16H37/06—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
    • F16H37/086—CVT using two coaxial friction members cooperating with at least one intermediate friction member
    • 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
    • F16H15/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members
    • F16H15/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members without members having orbital motion
    • F16H15/04—Gearings providing a continuous range of gear ratios
    • F16H15/06—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B
    • F16H15/26—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a spherical friction surface centered on its axis of revolution
    • F16H15/28—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a spherical friction surface centered on its axis of revolution with external friction surface
    • 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

Definitions

  • a driveline including a continuously variable transmission allows an operator or a control system to vary a drive ratio in a stepless manner, permitting a power source to operate at its most advantageous rotational speed.
  • a continuously variable transmission comprising: a first rotatable shaft operably coupleable to a source of rotational power; a second rotatable shaft aligned
  • a variator assembly having first and second traction rings in contact with a plurality of traction planets, each traction planet having a tiltable axis of rotation; wherein the variator assembly is coaxial with the main axis; a planetary gearset having a planet carrier, a sun gear, and a ring gear; wherein the sun gear is coupled to the first traction ring, the ring gear is coupled to the second traction ring, and the planet carrier coupled to the first rotatable shaft; a first clutch coupled to the ring gear, the first clutch coaxial with the first rotatable shaft; a second clutch coupled to the sun gear
  • the first synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the second synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the third synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the fourth synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the first clutch is configured to selectively engage a first mode gear set and a third mode gear set.
  • the second clutch is configured to selectively engage a second mode gear set and a reverse mode gear set.
  • the first synchronizer clutch is operably coupled to the first mode gear set.
  • the second synchronizer clutch is operably coupled to the second mode gear set.
  • the third synchronizer clutch is operably coupled to the third mode gear set.
  • the fourth synchronizer clutch is operably coupled to the reverse mode gear set.
  • the first mode gear set is coupled to the first rotatable shaft and the third rotatable shaft. In some embodiments of the continuously variable
  • the second mode gear set is coupled to the second rotatable shaft and the third rotatable shaft.
  • the third mode gear set is coupled to the first rotatable shaft and the fifth rotatable shaft.
  • the reverse mode gear set is coupled to the second rotatable shaft and the fourth rotatable shaft.
  • a continuously variable transmission comprising: a first rotatable shaft operably coupleable to a source of rotational power; a second rotatable shaft aligned
  • a variator assembly having first and second traction rings in contact with a plurality of traction planets, each traction planet having a tiltable axis of rotation; wherein the variator assembly is coaxial with the main axis; a planetary gearset having a planet carrier, a sun gear, and a ring gear; wherein the sun gear is coupled to the first traction ring, the ring gear is coupled to the second traction ring, and the planet carrier coupled to the first rotatable shaft; a first clutch coupled to the ring gear, the first clutch coaxial with the first rotatable shaft; a second clutch coupled to the sun gear
  • the first synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the third synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the fourth synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the second synchronizer clutch is a three position clutch having a neutral position, a first engaged position, and a second engaged position.
  • the first clutch is configured to selectively engage a first mode gear set and a third mode gear set.
  • the second clutch is configured to selectively engage a second mode gear set and a fourth mode gear set.
  • the first synchronizer clutch is coupled to the first mode gear set.
  • the second synchronizer clutch is coupled to the second mode gear set.
  • the second synchronizer clutch is coupled to a reverse mode gear set.
  • the third synchronizer clutch is coupled to the third mode gear set.
  • the fourth synchronizer clutch is coupled to the fourth mode gear set.
  • the reverse mode gear set is coupled to the third rotatable shaft and the fifth rotatable shaft.
  • the first mode gear set is operably coupled to the first rotatable shaft, the third rotatable shaft, and the fifth rotatable shaft.
  • the second mode gear set is operably coupled to the second rotatable shaft, the third rotatable shaft, and the fifth rotatable shaft.
  • the third mode gear set is operably coupled to the first rotatable shaft and the fourth rotatable shaft.
  • the fourth mode gear set is operably coupled to the second rotatable shaft and the fourth rotatable shaft.
  • a first-second-reverse final drive gear set, the first-second-reverse final gear set operably coupled to the fifth rotatable shaft is provided.
  • a third-fourth final drive gear set, the third-fourth final drive gear set operably coupled to the fourth rotatable shaft is provided.
  • a continuously variable transmission comprising: a first rotatable shaft operably coupleable to a source of rotational power; a second rotatable shaft aligned
  • a third rotatable shaft aligned substantially parallel to the main axis; a variator assembly having first and second traction rings in contact with a plurality of traction planets, each traction planet having a tiltable axis of rotation; wherein the variator assembly is coaxial with the main axis; a planetary gearset having a planet carrier, a sun gear, and a ring gear; wherein the sun gear is coupled to the first traction ring, the ring gear is coupled to the second traction ring, and the planet carrier coupled to the first rotatable shaft; a first clutch coupled to the ring gear, the first clutch coaxial with the first rotatable shaft; a second clutch coaxial with the third rotatable shaft; a third clutch operably coupled to the first rotatable shaft; a first synchronizer clutch coaxial with, and coupled to, the third rotatable shaft;
  • the first synchronizer clutch is a three position clutch having a neutral position, a first engaged position, and a second engaged position.
  • the second synchronizer clutch is a three position clutch having a neutral position, a first engaged position, and a second engaged position.
  • the third synchronizer clutch is a three position clutch having a neutral position, a first engaged position, and a second engaged position.
  • the fourth synchronizer clutch is a three position clutch having a neutral position, a first engaged position, and a second engaged position.
  • synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the first synchronizer clutch is coupled to a first mode gear set. In some embodiments of the continuously variable transmission, the first synchronizer clutch is coupled to a third mode gear set. In some embodiments of the continuously variable transmission, the second synchronizer clutch is coupled to a fourth mode gear set. In some embodiments of the continuously variable transmission, the third synchronizer clutch is coupled to a reverse mode gear set. In some embodiments of the continuously variable transmission, the third synchronizer clutch is coupled to a launch mode gear set. In some embodiments of the continuously variable transmission, the fourth synchronizer clutch is coupled to an overdrive mode gear set. In some embodiments of the continuously variable transmission, the first clutch is coupled to the first mode gear set and the third mode gear set. In some embodiments of the continuously variable transmission, the second clutch is coupled to the second mode gear set and the fourth mode gear set. In some embodiments of the continuously variable transmission, the third clutch is operably coupled to the overdrive mode gear set and the launch mode gear set.
  • a continuously variable transmission comprising: a first rotatable shaft operably coupleable to a source of rotational power; a second rotatable shaft aligned substantially coaxial to the first rotatable shaft, the first rotatable shaft and second rotatable shaft forming a main axis of the transmission; a third rotatable shaft aligned substantially parallel to the main axis; a variator assembly having first and second traction rings in contact with a plurality of traction planets, each traction planet having a tiltable axis of rotation; wherein the variator assembly is coaxial with the main axis; a planetary gearset having a planet carrier, a sun gear, and a ring gear; wherein the sun gear is coupled to the first traction ring, the ring gear is coupled to the second traction ring, and the planet carrier coupled to the first rotatable shaft; a first clutch coupled to the ring gear, the first clutch coaxial with the first rotatable shaft;
  • the first synchronizer clutch is a three position clutch having a neutral position, a first engaged position, and a second engaged position.
  • the second synchronizer clutch is a two position clutch having a neutral position and an engaged position. In some embodiments of the continuously variable transmission
  • the first synchronizer clutch is coupled to a first mode gear set. In some embodiments of the continuously variable transmission, the first synchronizer clutch is coupled to a third mode gear set. In some embodiments of the continuously variable transmission, the second clutch is coupled to a second mode gear set. In some embodiments of the continuously variable transmission, the second mode gear set is coupled to the sun gear. In some embodiments of the continuously variable transmission, the second synchronizer clutch is coupled to a reverse mode gear set. In some embodiments of the continuously variable transmission, a final drive gear set coupled to the third rotatable shaft is provided.
  • a continuously variable transmission comprising: a first rotatable shaft operably coupleable to a source of rotational power; a second rotatable shaft aligned
  • a variator assembly having first and second traction rings in contact with a plurality of traction planets, each traction planet having a tiltable axis of rotation; wherein the variator assembly is coaxial with the main axis; a planetary gearset having a planet carrier, a sun gear, and a ring gear;
  • the sun gear is coupled to the first traction ring, the ring gear is coupled to the second traction ring, and the planet carrier coupled to the first rotatable shaft; a first clutch coupled to the ring gear, the first clutch coaxial with the first rotatable shaft; a second clutch coupled to the sun gear, the second clutch coaxial with, and coupled to, the second rotatable shaft; a third clutch coaxial with, and coupled to, the first rotatable shaft; a first synchronizer clutch coaxial with, and coupled to, the third rotatable shaft; a second synchronizer clutch coaxial with, and coupled to, the third rotatable shaft; a third synchronizer clutch coaxial with, and coupled to, the fourth rotatable shaft; and a fourth synchronizer clutch coaxial with, and coupled to, the fourth rotatable shaft.
  • the first synchronizer clutch is a three position clutch having a neutral position, a first engaged position, and a second engaged position.
  • the second synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the third synchronizer clutch is a three position clutch having a neutral position, a first engaged position, and a second engaged position.
  • the fourth synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the fifth synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the first clutch is configured to selectively engage a first mode gear set and a third mode gear set.
  • the second clutch is configured to selectively engage a second mode gear set and a fourth mode gear set.
  • the first synchronizer clutch is coupled to the first mode gear set.
  • the first synchronizer clutch is coupled to an overdrive mode gear set.
  • the second clutch is configured to selectively engage a first mode gear set and a third mode gear set.
  • the second clutch is configured to selectively engage a second mode gear set and a fourth mode gear set.
  • the first synchronizer clutch is coupled to the first mode gear set.
  • the first synchronizer clutch is coupled to an overdrive mode gear set.
  • the synchronizer clutch is coupled to the second mode gear set. In some embodiments of the continuously variable transmission, the third synchronizer clutch is coupled to the third mode gear set. In some embodiments of the continuously variable transmission, the third synchronizer clutch is coupled to a reverse mode gear set. In some embodiments of the continuously variable transmission, the fourth synchronizer clutch is coupled to the fourth mode gear set. In some embodiments of the continuously variable transmission, the fifth synchronizer clutch is coupled to a launch mode gear set. In some embodiments of the continuously variable transmission, the third clutch is configured to selectively engage the launch mode gear set and the reverse mode gear set.
  • a continuously variable transmission comprising: a first rotatable shaft operably coupleable to a source of rotational power; a second rotatable shaft aligned
  • a variator assembly having first and second traction rings in contact with a plurality of traction planets, each traction planet having a tiltable axis of rotation; wherein the variator assembly is coaxial with the main axis; a planetary gear set having a planet carrier, a sun gear, and a ring gear;
  • the sun gear is coupled to the first traction ring
  • the ring gear is coupled to the second traction ring
  • the planet carrier coupled to the first rotatable shaft
  • a first clutch coupled to the ring gear, the first clutch coaxial with the first rotatable shaft
  • a second clutch coaxial with, and coupled to, the third rotatable shaft
  • a first synchronizer clutch coaxial with, and coupled to, the third rotatable shaft
  • a second synchronizer clutch coaxial with, and coupled to, the fourth rotatable shaft.
  • the first synchronizer clutch is a three position clutch having a neutral position, a first engaged position, and a second engaged position.
  • the second synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the first synchronizer clutch is coupled to a first mode gear set.
  • the first synchronizer clutch is coupled to a third mode gear set.
  • the second clutch is coupled to a second mode gear set.
  • the second synchronizer clutch is coupled to a reverse mode gear set.
  • a forward final drive gear set operably coupled to the third rotatable shaft is provided.
  • a reverse final drive gear set operably coupled to the fourth rotatable shaft is provided.
  • a continuously variable transmission comprising: a first rotatable shaft operably coupleable to a source of rotational power; a second rotatable shaft aligned
  • a variator assembly having first and second traction rings in contact with a plurality of traction planets, each traction planet having a tiltable axis of rotation; wherein the variator assembly is coaxial with the main axis; a planetary gearset having a planet carrier, a sun gear, and a ring gear; wherein the sun gear is coupled to the first traction ring, the ring gear is coupled to the second traction ring, and the planet carrier coupled to the first rotatable shaft; a first clutch coupled to the ring gear, the first clutch coaxial with the first rotatable shaft; a second clutch coupled to the sun gear
  • the first synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the third synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the fourth synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the second synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the fifth synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the first clutch is configured to selectively engage a first mode gear set and a third mode gear set.
  • the second clutch is configured to selectively engage a second mode gear set and a fourth mode gear set.
  • the first synchronizer clutch is coupled to the first mode gear set.
  • the second synchronizer clutch is coupled to the second mode gear set.
  • the fifth synchronizer clutch is coupled to a reverse mode gear set.
  • the third synchronizer clutch is coupled to the third mode gear set.
  • the fourth synchronizer clutch is coupled to the fourth mode gear set.
  • the reverse mode gear set is coupled to the third rotatable shaft and the fifth rotatable shaft.
  • the first mode gear set is operably coupled to the first rotatable shaft and the third rotatable shaft.
  • the second mode gear set is operably coupled to the second rotatable shaft and the third rotatable shaft.
  • the third mode gear set is operably coupled to the first rotatable shaft and the fourth rotatable shaft.
  • the fourth mode gear set is operably coupled to the second rotatable shaft and the fourth rotatable shaft.
  • a first and second final drive gear set is provided, the first and second final gear set operably coupled to the third rotatable shaft.
  • a third-fourth final drive gear set is provided, the third-fourth final drive gear set operably coupled to the fourth rotatable shaft.
  • a continuously variable transmission comprising: a first rotatable shaft operably coupleable to a source of rotational power; a second rotatable shaft aligned
  • a variator assembly having first and second traction rings in contact with a plurality of traction planets, each traction planet having a tiltable axis of rotation; wherein the variator assembly is coaxial with the main axis; a planetary gearset having a planet carrier, a sun gear, and a ring gear;
  • the sun gear is coupled to the first traction ring, the ring gear is coupled to the second traction ring, and the planet carrier coupled to the first rotatable shaft; a first clutch coupled to the sun gear, the first clutch coaxial with the second rotatable shaft; a second clutch coupled to the ring gear, the second clutch coaxial with the first rotatable shaft; a first synchronizer clutch operably coupled to the first clutch, the first synchronizer clutch coaxial with, and coupled to, the third rotatable shaft; a second synchronizer clutch operably coupled to the second clutch, the second synchronizer clutch coaxial with, and coupled to, the fourth rotatable shaft; a third synchronizer clutch operably coupled to the first clutch, the third synchronizer clutch coaxial with, and coupled to, the fourth rotatable shaft; and a fourth synchronizer clutch operably coupled to the second clutch, the fourth synchronizer coaxial with, and coupled to, the third rotatable shaft.
  • the first synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the third synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the fourth synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the second synchronizer is a two position clutch having a neutral position and an engaged position.
  • the first clutch is configured to selectively engage a first mode gear set and a third mode gear set.
  • the second clutch is configured to selectively engage a second mode gear set and a reverse mode gear set.
  • the first synchronizer clutch is coupled to the first mode gear set.
  • the second clutch is configured to selectively engage a second mode gear set and a reverse mode gear set.
  • the synchronizer clutch is coupled to the second mode gear set. In some embodiments of the continuously variable transmission, the fourth synchronizer clutch is coupled to a reverse mode gear set. In some embodiments of the continuously variable transmission, the third synchronizer clutch is coupled to the third mode gear set. In some embodiments of the continuously variable transmission, the reverse mode gear set is coupled to the third rotatable shaft and the fifth rotatable shaft. In some embodiments of the continuously variable transmission, the first mode gear set is operably coupled to the first rotatable shaft, the third rotatable shaft, and the fourth rotatable shaft. In some embodiments of the continuously variable transmission, the second mode gear set is operably coupled to the first rotatable shaft and the fourth rotatable shaft. In some embodiments of the continuously variable transmission, the third mode gear set is operably coupled to the second rotatable shaft and the fourth rotatable shaft. In some embodiments of the continuously variable transmission, the third mode gear set is operably coupled to the second rotatable shaft and the fourth rotatable shaft. In some
  • a second-and-third final drive gear set is provided, the second-and-third final gear set operably coupled to the fourth rotatable shaft.
  • a final drive gear set is operably coupled to the third rotatable shaft.
  • a continuously variable transmission comprising: a first rotatable shaft operably coupleable to a source of rotational power; a second rotatable shaft aligned coaxial to the first rotatable shaft, the first rotatable shaft and second rotatable shaft forming a main axis of the transmission; a third rotatable shaft aligned parallel to the main axis; a fourth rotatable shaft aligned parallel to the main axis; a variator assembly having first and second traction rings in contact with a plurality of traction planets, each traction planet having a tiltable axis of rotation; wherein the variator assembly is coaxial with the main axis; a planetary gearset having a planet carrier, a sun gear, an array of planet gears coupled to the planet carrier, and a ring gear; wherein the sun gear is coupled to the first traction ring, the ring gear is coupled to the second traction ring, and the planet carrier coupled to the first rot
  • the first synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the third synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the fourth synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the second synchronizer is a two position clutch having a neutral position and an engaged position.
  • a fifth rotatable shaft is arranged parallel to the main axis. In some embodiments of the continuously variable transmission, a fifth synchronizer clutch is coupled to the fifth rotatable shaft.
  • the array of planet gears comprise a plurality of stepped gears. In some embodiments of the continuously variable transmission, the array of planet gears comprises a plurality of straight gears. In some embodiments of the continuously variable transmission, a first-and-third mode drive gear coupled to the first clutch, wherein the first-and-third mode drive gear is operably coupled to the first synchronizer clutch and the third synchronizer clutch. In some embodiments of the continuously variable transmission, a second-and-fourth mode drive gear coupled to the second clutch, wherein the second-and-fourth mode drive gear is operably coupled to the second synchronizer and the fourth synchronizer.
  • a first mode of operation corresponds to an engagement of the first clutch and the first synchronizer clutch.
  • a second mode of operation corresponds to an engagement of the second clutch and the second synchronizer clutch.
  • a third mode of operation corresponds to an engagement of the first clutch and the third synchronizer clutch.
  • a fourth mode of operation corresponds to an engagement of the second clutch and the fourth synchronizer clutch.
  • a reverse mode of operation corresponds to an engagement of the second clutch and the fifth synchronizer clutch.
  • Figure 1 is a side sectional view of a ball-type variator.
  • Figure 2 is a plan view of a carrier member that can be used in the variator of Figure 1.
  • Figure 3 is an illustrative view of different tilt positions of the ball-type variator of Figure 1.
  • Figure 4 is a schematic diagram of a powersplit variator.
  • Figure 5 is a schematic diagram of a three-mode powersplit continuously variable transmission.
  • Figure 6 is a schematic diagram of a 4-mode powersplit continuously variable transmission.
  • Figure 7 is schematic diagram of another 4-mode powersplit continuously variable transmission.
  • Figure 8 is a schematic diagram of another 3 -mode powersplit continuously variable transmission.
  • Figure 9 is a schematic diagram of yet another 4-mode powersplit continuously variable transmission.
  • Figure 10 is a schematic diagram of yet another 3-mode powersplit continuously variable transmission.
  • Figure 11 is a schematic diagram of yet another 4-mode powersplit continuously variable transmission.
  • Figure 12 is a schematic diagram of yet another 3-mode powersplit continuously variable transmission.
  • Figure 13 is a schematic diagram of yet another 4-mode powersplit continuously variable transmission.
  • Figure 14 is a table depicting clutch engagement for corresponding modes of operation of the transmission of Figure 13.
  • CVTs based on a ball type variators, also known as CVP, for continuously variable planetary.
  • Basic concepts of a ball type Continuously Variable Transmissions are described in United States Patent No. 8,469,856 and 8,870,711 incorporated herein by reference in their entirety.
  • Such a CVT adapted herein as described throughout this specification, comprises a number of balls (planets, spheres) 1, depending on the application, two ring (disc) assemblies with a conical surface contact with the balls, as input 2 and output 3, and an idler (sun) assembly 4 as shown on FIG. 1.
  • the balls are mounted on tiltable axles 5, themselves held in a carrier (stator, cage) assembly having a first carrier member 6 operably coupled to a second carrier member 7.
  • the first carrier member 6 can rotate with respect to the second carrier member 7, and vice versa.
  • the first carrier member 6 can be substantially fixed from rotation while the second carrier member 7 is configured to rotate with respect to the first carrier member, and vice versa.
  • the first carrier member 6 can be provided with a number of radial guide slots 8.
  • the second carrier member 7 can be provided with a number of radially offset guide slots 9, as illustrated in FIG. 2.
  • the radial guide slots 8 and the radially offset guide slots 9 are adapted to guide the tiltable axles 5.
  • the axles 5 can be adjusted to achieve a desired ratio of input speed to output speed during operation of the CVT.
  • adjustment of the axles 5 involves control of the position of the first and second carrier members to impart a tilting of the axles 5 and thereby adjusts the speed ratio of the variator.
  • Other types of ball CVTs also exist, like the one produced by Milner, but are slightly different.
  • FIG. 3 The working principle of such a CVP of FIG. 1 is shown on FIG. 3.
  • the CVP itself works with a traction fluid.
  • the lubricant between the ball and the conical rings acts as a solid at high pressure, transferring the power from the input ring, through the balls, to the output ring.
  • the ratio can be changed between input and output.
  • the ratio is one, illustrated in FIG. 3, when the axis is tilted the distance between the axis and the contact point change, modifying the overall ratio. All the balls' axes are tilted at the same time with a mechanism included in the carrier and/or idler.
  • Embodiments of the invention disclosed here are related to the control of a variator and/or a CVT using generally spherical planets each having a tiltable axis of rotation that can be adjusted to achieve a desired ratio of input speed to output speed during operation.
  • adjustment of said axis of rotation involves angular misalignment of the planet axis in a first plane in order to achieve an angular adjustment of the planet axis in a second plane that is substantially perpendicular to the first plane, thereby adjusting the speed ratio of the variator.
  • the angular misalignment in the first plane is referred to here as "skew", “skew angle”, and/or "skew condition".
  • a control system coordinates the use of a skew angle to generate forces between certain contacting components in the variator that will tilt the planet axis of rotation. The tilting of the planet axis of rotation adjusts the speed ratio of the variator.
  • multiple mode powertrain configurations depicted as having a ball- type variator are optionally implemented using other continuously variable devices having coaxial power input and power output elements that rotate in a common direction.
  • a hydrostatic transmission of the type disclosed in United States Patent No. 7,739,870, which is hereby incorporated by reference is optionally used in any of the powertrain embodiments disclosed here.
  • a number of rolling element transmissions are optionally used in any of the powertrain embodiments disclosed here, for example, the rolling element transmission disclosed in United States Patent No. 8,827,864, which is hereby incorporated by reference.
  • radial is used here to indicate a direction or position that is perpendicular relative to a longitudinal axis of a transmission or variator.
  • axial refers to a direction or position along an axis that is parallel to a main or longitudinal axis of a transmission or variator.
  • operationally linked refers to a relationship (mechanical, linkage, coupling, etc.) between elements whereby operation of one element results in a corresponding, following, or simultaneous operation or actuation of a second element. It is noted that in using said terms to describe inventive embodiments, specific structures or mechanisms that link or couple the elements are typically described. However, unless otherwise specifically stated, when one of said terms is used, the term indicates that the actual linkage or coupling can take a variety of forms, which in certain instances will be readily apparent to a person of ordinary skill in the relevant technology.
  • Traction drives usually involve the transfer of power between two elements by shear forces in a thin fluid layer trapped between the elements.
  • the fluids used in these applications usually exhibit traction coefficients greater than conventional mineral oils.
  • the traction coefficient ( ⁇ ) represents the maximum available traction force which would be available at the interfaces of the contacting components and is the ratio of the maximum available drive torque per contact force.
  • friction drives generally relate to transferring power between two elements by frictional forces between the elements.
  • the CVTs described here can operate in both tractive and frictional applications.
  • the CVT can operate at times as a friction drive and at other times as a traction drive, depending on the torque and speed conditions present during operation.
  • a powersplit variator 10 includes the balls 1, the first traction ring assembly 2, and the second traction ring assembly 3 operably coupled to a planetary gear set 1 1.
  • the planetary gear set includes a planet carrier 12 coupled to a ring gear 13 and coupled to a sun gear 14.
  • a first shaft 15 is coupled to the planet carrier 12.
  • the first shaft 15 is adapted to transfer rotational power.
  • the first shaft 15 is operably coupled to a source of rotational power, such as an internal combustion engine, an electric motor, or other input power coupling device, for example, a torque converter.
  • the first traction ring assembly 2 is coupled to a second shaft 16
  • the second traction ring assembly 3 is coupled to the ring gear 13.
  • the first rotatable shaft 15 and the second rotatable shaft 16 are coaxial.
  • the first rotatable shaft 15 and the second rotatable shaft 16 form a main axis, or longitudinal axis, of the powersplit variator 10.
  • various embodiments of transmission configurations presented herein include clutches, shafts, gear sets, and other power transmission couplings adapted to couple to the powersplit variator 10.
  • embodiments disclosed herein include the powersplit variator 10. It should be appreciated, that some embodiments can include other configurations of the powersplit variator 10 or the variator depicted in FIG. 1.
  • a continuously variable transmission (CVT) 20 has the powersplit variator 10 adapted to receive an input power from a torque converter 21. It should be appreciated that the torque converter 21 is shown as an illustrative example of an input power coupling to the continuously variable transmissions disclosed herein.
  • the CVT 20 includes a third rotatable shaft 22 aligned substantially parallel to the first rotatable shaft 15, or main axis of the CVT 20.
  • the CVT 20 includes a fourth rotatable shaft 23 aligned substantially parallel to the third rotatable shaft 22 and the first rotatable shaft 15.
  • the CVT 20 includes a first clutch 24 positioned coaxially with the first rotatable shaft 15.
  • the CVT 20 includes a second clutch 25 positioned coaxially with the second rotatable shaft 16.
  • the first clutch 24 is configured to selectively couple to the ring gear 13.
  • the first clutch 24 is a well-known wet clutch having two positions of engagement.
  • the first clutch 24 is a dry clutch or other typical selective coupling device.
  • the second clutch 25 is configured to selectively couple to the second rotatable shaft 16.
  • the second clutch 25 is a well-known wet clutch having two positions of engagement. In other
  • the second clutch 25 is a dry clutch or other typical selective coupling device.
  • the CVT 20 includes a first synchronizer clutch 26 and a second synchronizer clutch 27, each positioned coaxial with the third rotatable shaft 22.
  • the CVT 20 includes a third synchronizer clutch 28 operably coupled to a fifth rotatable shaft 29.
  • the fifth rotatable shaft 29 is substantially parallel to the first rotatable shaft 15.
  • the CVT 20 includes a fourth synchronizer clutch 30 arranged coaxially with the fourth rotatable shaft 23.
  • the first synchronizer clutch 26 is configured to selectively engage a first mode gear set 31.
  • the first synchronizer clutch 26 is a two position synchronizer clutch.
  • the second synchronizer clutch 27 is configured to selectively engage a second mode gear set 32.
  • the second synchronizer clutch 27 is a two position synchronizer clutch.
  • the third synchronizer clutch 28 is configured to selectively engage a third mode gear set 33.
  • the third synchronizer clutch 28 is a two position synchronizer clutch.
  • the fourth synchronizer clutch 30 is configured to selectively engage a reverse mode gear set 34.
  • the fourth synchronizer clutch 30 is a two position synchronizer clutch.
  • the CVT 20 includes a final drive gear 35 configured to couple to an output power coupling of a vehicle, for example, a well-known differential.
  • synchronizer mechanisms used in power transmissions include a well-known dog clutch integrated with a speed-matching device such as a cone-clutch.
  • a speed-matching device such as a cone-clutch.
  • a synchronizer mechanism or synchronizer clutch is used, which consists of a cone clutch. Before the teeth can engage, the cone clutch engages first, which brings the two rotating elements to the same speed using friction. Until synchronization occurs, the teeth are prevented from making contact.
  • a synchronizer clutch can be a two position clutch having an engaged position and a neutral (or free) position.
  • a synchronizer clutch can be a three position clutch having a first engaged position, a second engaged position, and a neutral position.
  • Embodiments disclosed herein use synchronizer clutches to enable the pre-selection of gear sets by a control system (not shown) for smooth transition between operating modes of the transmission.
  • a continuously variable transmission comprising: a first rotatable shaft operably coupleable to a source of rotational power; a second rotatable shaft aligned
  • a variator assembly having first and second traction rings in contact with a plurality of traction planets, each traction planet having a tiltable axis of rotation; wherein the variator assembly is coaxial with the main axis; a planetary gearset having a planet carrier, a sun gear, and a ring gear; wherein the sun gear is coupled to the first traction ring, the ring gear is coupled to the second traction ring, and the planet carrier coupled to the first rotatable shaft; a first clutch coupled to the ring gear, the first clutch coaxial with the first rotatable shaft; a second clutch coupled to the sun gear
  • the first synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the second synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the third synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the fourth synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the first clutch is configured to selectively engage a first mode gear set and a third mode gear set.
  • the second clutch is configured to selectively engage a second mode gear set and a reverse mode gear set.
  • the first synchronizer clutch is operably coupled to the first mode gear set.
  • the second synchronizer clutch is operably coupled to the second mode gear set.
  • the third synchronizer clutch is operably coupled to the third mode gear set.
  • the fourth synchronizer clutch is operably coupled to the reverse mode gear set.
  • the first mode gear set is coupled to the first rotatable shaft and the third rotatable shaft. In some embodiments of the continuously variable
  • the second mode gear set is coupled to the second rotatable shaft and the third rotatable shaft.
  • the third mode gear set is coupled to the first rotatable shaft and the fifth rotatable shaft.
  • the reverse mode gear set is coupled to the second rotatable shaft and the fourth rotatable shaft.
  • a continuously variable transmission (CVT) 40 includes the powersplit variator 10 operably coupled to the torque converter 21.
  • the CVT 40 includes a third rotatable shaft 41 aligned substantially parallel to the first rotatable shaft 15.
  • the CVT 40 includes a fourth rotatable shaft 42 aligned substantially parallel to the first rotatable shaft 15.
  • the CVT 40 includes a fifth rotatable shaft 43 aligned substantially parallel to the first rotatable shaft 15.
  • the CVT 40 has a first clutch 44 positioned on the first rotatable shaft 15.
  • the first clutch 44 is configured to operably couple to the ring gear 13.
  • the CVT 40 has a second clutch 45 operably coupled to the second rotatable shaft 16.
  • the first clutch 44 and the second clutch 45 are typical wet clutches.
  • the CVT 40 has a first synchronizer clutch 46 positioned on the third rotatable shaft 41.
  • the first synchronizer clutch 46 is a two position clutch.
  • the CVT 40 has a second synchronizer clutch 47 positioned on the third rotatable shaft 41. The second
  • the synchronizer clutch 47 is a three position clutch.
  • the CVT 40 has a third synchronizer clutch 48 and a fourth synchronizer clutch 49, each positioned on the fourth rotatable shaft 42.
  • the first synchronizer clutch 46 is configured to selectively engage a first mode gear set 50.
  • the first mode gear set 50 is operably coupled to the first clutch 44.
  • the second synchronizer clutch 47 is configured to selectively engage a second mode gear set 51.
  • the second mode gear set 51 is operably coupled to the second clutch 45.
  • the second synchronizer clutch 47 is configured to selectively engage a reverse mode gear set 52.
  • the reverse mode gear set 52 is operably coupled to the fifth rotatable shaft 43.
  • the third synchronizer clutch 48 is configured to selectively engage a third mode gear set 53.
  • the third mode gear set 53 is operably coupled to the first clutch 44.
  • the fourth synchronizer clutch 49 is configured to selectively engage a fourth mode gear set 54.
  • the fourth mode gear set 54 is operably coupled to the second clutch 45.
  • the CVT 40 includes a final drive gear 55 configured to operably couple to a typical output power coupling, such as a differential.
  • the CVT 40 includes a first-and-second final drive gear set 56 operably coupled to the final drive gear 55.
  • the CVT 40 includes a third-and-fourth final drive gear set 57 operably coupled to the final drive gear 55.
  • a continuously variable transmission comprising: a first rotatable shaft operably coupleable to a source of rotational power; a second rotatable shaft aligned
  • a variator assembly having first and second traction rings in contact with a plurality of traction planets, each traction planet having a tiltable axis of rotation; wherein the variator assembly is coaxial with the main axis; a planetary gearset having a planet carrier, a sun gear, and a ring gear; wherein the sun gear is coupled to the first traction ring, the ring gear is coupled to the second traction ring, and the planet carrier coupled to the first rotatable shaft; a first clutch coupled to the ring gear, the first clutch coaxial with the first rotatable shaft; a second clutch coupled to the sun gear
  • the first synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the third synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the fourth synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the second synchronizer clutch is a three position clutch having a neutral position, a first engaged position, and a second engaged position.
  • the first clutch is configured to selectively engage a first mode gear set and a third mode gear set.
  • the second clutch is configured to selectively engage a second mode gear set and a fourth mode gear set.
  • the first synchronizer clutch is coupled to the first mode gear set.
  • the second synchronizer clutch is coupled to the second mode gear set.
  • the second synchronizer clutch is coupled to a reverse mode gear set.
  • the third synchronizer clutch is coupled to the third mode gear set.
  • the fourth synchronizer clutch is coupled to the fourth mode gear set.
  • the reverse mode gear set is coupled to the third rotatable shaft and the fifth rotatable shaft.
  • the first mode gear set is operably coupled to the first rotatable shaft, the third rotatable shaft, and the fifth rotatable shaft.
  • the second mode gear set is operably coupled to the second rotatable shaft, the third rotatable shaft, and the fifth rotatable shaft.
  • the third mode gear set is operably coupled to the first rotatable shaft and the fourth rotatable shaft.
  • the fourth mode gear set is operably coupled to the second rotatable shaft and the fourth rotatable shaft.
  • a first-second-reverse final drive gear set, the first-second-reverse final gear set operably coupled to the fifth rotatable shaft is provided.
  • a third-fourth final drive gear set, the third-fourth final drive gear set operably coupled to the fourth rotatable shaft is provided.
  • a continuously variable transmission (CVT) 60 includes the powersplit variator 10 operably coupled to the torque converter 21.
  • the CVT 60 has a third rotatable shaft 61 aligned substantially parallel to the first rotatable shaft 15.
  • the CVT 60 includes a first clutch 62 positioned coaxially with the first rotatable shaft 15.
  • the first clutch 62 is coupled to the ring gear 13.
  • the CVT 60 includes a second clutch 63 positioned coaxially with the third rotatable shaft 61.
  • the CVT 60 includes a third clutch 64 positioned coaxially with the first rotatable shaft 15.
  • the first clutch 62, the second clutch 63, and the third clutch 64 are wet clutches.
  • the CVT 40 has a first synchronizer clutch 65 positioned coaxially with the third rotatable shaft 61.
  • the first synchronizer clutch 65 is a three position clutch.
  • the CVT 40 has a second synchronizer clutch 66 positioned coaxially with the second rotatable shaft 16.
  • the second synchronizer clutch 66 is a three position clutch.
  • the CVT 40 has a third synchronizer clutch 67 positioned coaxially with the third rotatable shaft 61.
  • the third synchronizer clutch 67 is a two position clutch.
  • the CVT 40 has a fourth synchronizer clutch 68 positioned coaxially with the third rotatable shaft 61.
  • the fourth synchronizer clutch 68 is a two position clutch.
  • the first synchronizer clutch 65 is operably coupled to a first mode gear set 69.
  • the first mode gear set 69 is coupled to the first clutch 62.
  • the synchronizer clutch 66 is operably coupled to a second mode gear set 70.
  • the second mode gear set 70 is coupled to the second clutch 63.
  • the first synchronizer clutch 65 is operably coupled to a third mode gear set 71.
  • the third mode gear set 71 is coupled to the first clutch 62.
  • the second synchronizer clutch 66 is operably coupled to a fourth mode gear set 72.
  • the fourth mode gear set 72 is coupled to the second clutch 63.
  • the third synchronizer clutch 67 is operably coupled to a launch mode gear set 73.
  • the launch mode gear set 73 is coupled to the third clutch 64.
  • the third synchronizer clutch 67 is operably coupled to a reverse mode gear set 74.
  • the reverse mode gear set 74 is coupled to the third clutch 64.
  • the fourth synchronizer clutch 68 is operably coupled to an overdrive mode gear set 75.
  • the overdrive mode gear set 75 is coupled to the third clutch 64.
  • engagement of the third clutch 64 to the launch mode gear set 73, the overdrive mode gear set 75, or the reverse mode gear set 74 effectively bypasses input power to a final drive gear 76.
  • an input power is not routed through the powersplit variator 10 when the third clutch 64 engages the launch mode gear set 73, the overdrive mode gear set 75, or the reverse mode gear set 74.
  • a continuously variable transmission comprising: a first rotatable shaft operably coupleable to a source of rotational power; a second rotatable shaft aligned
  • a third rotatable shaft aligned substantially parallel to the main axis; a variator assembly having first and second traction rings in contact with a plurality of traction planets, each traction planet having a tiltable axis of rotation; wherein the variator assembly is coaxial with the main axis; a planetary gearset having a planet carrier, a sun gear, and a ring gear; wherein the sun gear is coupled to the first traction ring, the ring gear is coupled to the second traction ring, and the planet carrier coupled to the first rotatable shaft; a first clutch coupled to the ring gear, the first clutch coaxial with the first rotatable shaft; a second clutch coaxial with the third rotatable shaft; a third clutch operably coupled to the first rotatable shaft; a first synchronizer clutch coaxial with, and coupled to, the third rotatable shaft;
  • the first synchronizer clutch is a three position clutch having a neutral position, a first engaged position, and a second engaged position.
  • the second synchronizer clutch is a three position clutch having a neutral position, a first engaged position, and a second engaged position.
  • the third synchronizer clutch is a three position clutch having a neutral position, a first engaged position, and a second engaged position.
  • the fourth synchronizer clutch is a three position clutch having a neutral position, a first engaged position, and a second engaged position.
  • the synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the first synchronizer clutch is coupled to a first mode gear set. In some embodiments of the continuously variable
  • the first synchronizer clutch is coupled to a third mode gear set.
  • the second synchronizer clutch is coupled to a fourth mode gear set.
  • the third synchronizer clutch is coupled to a reverse mode gear set.
  • the third synchronizer clutch is coupled to a launch mode gear set.
  • the fourth synchronizer clutch is coupled to an overdrive mode gear set.
  • the first clutch is coupled to the first mode gear set and the third mode gear set.
  • the second clutch is coupled to the second mode gear set and the fourth mode gear set.
  • the third clutch is operably coupled to the overdrive mode gear set and the launch mode gear set.
  • a continuously variable transmission (CVT) 80 includes the powersplit variator 10 operably coupled to the torque converter 21.
  • the CVT 80 has a third rotatable shaft 81 aligned substantially parallel to the first rotatable shaft 15.
  • the CVT 80 has a first clutch 82 coupled to the ring gear 13.
  • the CVT 80 has a second clutch 83 positioned coaxially with the third rotatable shaft 81.
  • the CVT 80 has a first synchronizer clutch 84 positioned coaxially with the third rotatable shaft 81.
  • the first synchronizer clutch 84 is a three position clutch.
  • the CVT 80 has a second synchronizer clutch 85 positioned coaxially with the third rotatable shaft 81.
  • the second synchronizer clutch 85 is a two position clutch.
  • the first synchronizer clutch 84 is operably coupled to a first mode gear set 86.
  • the first mode gear set 86 is coupled to the first clutch 82.
  • the second clutch 83 is coupled to a second mode gear set 87.
  • the second mode gear set 87 is coupled to the second rotatable shaft 16.
  • the first synchronizer clutch 84 is operably coupled to a first mode gear set 86.
  • the first mode gear set 86 is coupled to the first clutch 82.
  • the second clutch 83 is coupled to a second mode gear set 87.
  • the second mode gear set 87 is coupled to the second rotatable shaft 16.
  • the first synchronizer clutch 84 is operably coupled to a first mode gear set 86.
  • the first mode gear set 86 is coupled to the first clutch 82.
  • the synchronizer clutch 84 is operably coupled to a third mode gear set 88.
  • the third mode gear set 88 is coupled to the first clutch 82.
  • the second synchronizer clutch 85 is operably coupled to a reverse mode gear set 89.
  • the reverse mode gear set 89 is operably coupled to the first clutch 82.
  • the CVT 80 includes a final drive gear set 90 configured to couple to a typical output power coupling such as a differential.
  • a continuously variable transmission comprising: a first rotatable shaft operably coupleable to a source of rotational power; a second rotatable shaft aligned substantially coaxial to the first rotatable shaft, the first rotatable shaft and second rotatable shaft forming a main axis of the transmission; a third rotatable shaft aligned substantially parallel to the main axis; a variator assembly having first and second traction rings in contact with a plurality of traction planets, each traction planet having a tiltable axis of rotation; wherein the variator assembly is coaxial with the main axis; a planetary gearset having a planet carrier, a sun gear, and a ring gear; wherein the sun gear is coupled to the first traction ring, the ring gear is coupled to the second traction ring, and the planet carrier coupled to the first rotatable shaft; a first clutch coupled to the ring gear, the first clutch coaxial with the first rotatable shaft;
  • the first synchronizer clutch is a three position clutch having a neutral position, a first engaged position, and a second engaged position.
  • the second synchronizer clutch is a two position clutch having a neutral position and an engaged position. In some embodiments of the continuously variable transmission
  • the first synchronizer clutch is coupled to a first mode gear set. In some embodiments of the continuously variable transmission, the first synchronizer clutch is coupled to a third mode gear set. In some embodiments of the continuously variable transmission, the second clutch is coupled to a second mode gear set. In some embodiments of the continuously variable transmission, the second mode gear set is coupled to the sun gear. In some
  • the second synchronizer clutch is coupled to a reverse mode gear set.
  • a final drive gear set coupled to the third rotatable shaft is provided.
  • a continuously variable transmission (CVT) 100 includes the powersplit variator 10 operably coupled to the torque converter 21.
  • the CVT 100 has a third rotatable shaft 101 aligned substantially parallel to the first rotatable shaft 15.
  • the CVT 100 has a fourth rotatable shaft 102 aligned substantially parallel to the first rotatable shaft 15.
  • the CVT 100 has a first clutch 103 positioned coaxially with the first rotatable shaft 15.
  • the first clutch 103 is coupled to the ring gear 13.
  • the CVT 100 has a second clutch 104 coupled to the second rotatable shaft 16.
  • the CVT 100 has a third clutch 105 coupled to the first rotatable shaft 15.
  • the first clutch 103, the second clutch 104, and the third clutch 105 are typical wet clutches.
  • the CVT 100 has a first synchronizer clutch 106 coupled to the third rotatable shaft 101.
  • the first synchronizer clutch 106 is a three position clutch.
  • the CVT 100 has a second synchronizer clutch 107 coupled to the third rotatable shaft 101.
  • the second synchronizer clutch 107 is a two position clutch.
  • the CVT 100 has a third synchronizer clutch 108 coupled to the fourth rotatable shaft 102.
  • the third synchronizer clutch 108 is a three position clutch.
  • the CVT 100 has a fourth synchronizer clutch 109 coupled to the fourth rotatable shaft 102.
  • the fourth synchronizer clutch 109 is a two position clutch.
  • the CVT 100 has a fifth synchronizer clutch 110 coupled to the third rotatable shaft 101.
  • the fifth synchronizer clutch 110 is a two position clutch.
  • the first synchronizer clutch 106 is operably coupled to a first mode gear set 111.
  • the first mode gear set 111 is coupled to the first clutch 103.
  • the second synchronizer clutch 107 is operably coupled to a second mode gear set 112.
  • the second mode gear set 112 is coupled to the second clutch 104.
  • the third synchronizer clutch 108 is operably coupled to a third mode gear set 113.
  • the third mode gear set 113 is coupled to the first clutch 103.
  • the fourth synchronizer clutch 109 is operably coupled to a fourth mode gear set 114.
  • the fourth mode gear set 114 is coupled to the second clutch 104.
  • the first synchronizer clutch 106 is operably coupled to an overdrive mode gear set 115.
  • the overdrive mode gear set 115 is coupled to the third clutch 105.
  • the third synchronizer clutch 108 is operably coupled to a reverse mode gear set 116.
  • the reverse mode gear set 116 is coupled to the third clutch 105.
  • the CVT 100 has a first-second-launch-cruise final drive gear set 118 configured to couple to a typical output power coupling such as a differential.
  • the CVT 100 has a third-fourth-reverse final drive gear set 119 configured to couple to the differential, for example.
  • a continuously variable transmission comprising: a first rotatable shaft operably coupleable to a source of rotational power; a second rotatable shaft aligned
  • a variator assembly having first and second traction rings in contact with a plurality of traction planets, each traction planet having a tiltable axis of rotation; wherein the variator assembly is coaxial with the main axis; a planetary gearset having a planet carrier, a sun gear, and a ring gear;
  • the sun gear is coupled to the first traction ring, the ring gear is coupled to the second traction ring, and the planet carrier coupled to the first rotatable shaft; a first clutch coupled to the ring gear, the first clutch coaxial with the first rotatable shaft; a second clutch coupled to the sun gear, the second clutch coaxial with, and coupled to, the second rotatable shaft; a third clutch coaxial with, and coupled to, the first rotatable shaft; a first synchronizer clutch coaxial with, and coupled to, the third rotatable shaft; a second synchronizer clutch coaxial with, and coupled to, the third rotatable shaft; a third synchronizer clutch coaxial with, and coupled to, the fourth rotatable shaft; and a fourth synchronizer clutch coaxial with, and coupled to, the fourth rotatable shaft.
  • the first synchronizer clutch is a three position clutch having a neutral position, a first engaged position, and a second engaged position.
  • the second synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the third synchronizer clutch is a three position clutch having a neutral position, a first engaged position, and a second engaged position.
  • the fourth synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the fifth synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the first clutch is configured to selectively engage a first mode gear set and a third mode gear set.
  • the second clutch is configured to selectively engage a second mode gear set and a fourth mode gear set.
  • the first synchronizer clutch is coupled to the first mode gear set.
  • the first synchronizer clutch is coupled to an overdrive mode gear set.
  • the second clutch is configured to selectively engage a first mode gear set and a third mode gear set.
  • the second clutch is configured to selectively engage a second mode gear set and a fourth mode gear set.
  • the first synchronizer clutch is coupled to the first mode gear set.
  • the first synchronizer clutch is coupled to an overdrive mode gear set.
  • a continuously variable transmission (CVT) 120 includes the powersplit variator 10 operably coupled to the torque converter 21.
  • the CVT 120 has a third rotatable shaft 121 aligned substantially parallel to the first rotatable shaft 15.
  • the CVT 120 has a fourth rotatable shaft 122 aligned substantially parallel to the first rotatable shaft 15.
  • the CVT 120 has a first clutch 12 coupled to the ring gear 13.
  • the CVT 120 has a second clutch 124 coupled to the third rotatable shaft 121.
  • the first clutch 123 and the second clutch 124 are wet clutches.
  • the CVT 120 has first synchronizer clutch 125 coupled to the third rotatable shaft 121.
  • the first synchronizer clutch 125 is a three position clutch.
  • the CVT 120 has a second synchronizer clutch 126 coupled to the fourth rotatable shaft 122.
  • the second synchronizer clutch 126 is a two position clutch.
  • the first synchronizer clutch 125 is operably coupled to a first mode gear set 127.
  • the first mode gear set 127 is coupled to the first clutch.
  • the second clutch 124 is operably coupled to a second mode gear set 128.
  • the second mode gear set 128 is coupled to the second rotatable shaft 16.
  • the first synchronizer clutch 125 is operably coupled to a third mode gear set 129.
  • the third mode gear set 129 is coupled to the first clutch 123.
  • the second synchronizer clutch 126 is operably coupled to a reverse mode gear set 130.
  • the reverse mode gear set 130 is coupled to the first clutch 123.
  • the CVT 120 has a forward final drive gear set 131 configured to couple to a differential, for example.
  • the CVT 120 has a reverse final drive gear set 132 configured to couple to the differential.
  • a continuously variable transmission comprising: a first rotatable shaft operably coupleable to a source of rotational power; a second rotatable shaft aligned
  • a variator assembly having first and second traction rings in contact with a plurality of traction planets, each traction planet having a tiltable axis of rotation; wherein the variator assembly is coaxial with the main axis; a planetary gear set having a planet carrier, a sun gear, and a ring gear; wherein the sun gear is coupled to the first traction ring, the ring gear is coupled to the second traction ring, and the planet carrier coupled to the first rotatable shaft; a first clutch coupled to the ring gear, the first clutch coaxial with the first rotatable shaft; a second clutch coaxial with, and coupled to, the third rotatable shaft; a first synchronizer clutch coaxial
  • the first synchronizer clutch is a three position clutch having a neutral position, a first engaged position, and a second engaged position.
  • the second synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the first synchronizer clutch is coupled to a first mode gear set.
  • the first synchronizer clutch is coupled to a third mode gear set.
  • the second clutch is coupled to a second mode gear set.
  • the second synchronizer clutch is coupled to a reverse mode gear set.
  • a forward final drive gear set operably coupled to the third rotatable shaft is provided.
  • a reverse final drive gear set operably coupled to the fourth rotatable shaft is provided.
  • a continuously variable transmission (CVT) 140 includes the powersplit variator 10 operably coupled to the torque converter 21.
  • the CVT 140 includes a third rotatable shaft 141 aligned substantially parallel to the first rotatable shaft 15.
  • the CVT 140 includes a fourth rotatable shaft 142 aligned substantially parallel to the first rotatable shaft 15.
  • the CVT 140 includes a fifth rotatable shaft 143 aligned substantially parallel to the first rotatable shaft 15.
  • the CVT 140 has a first clutch 144 positioned on the first rotatable shaft 15.
  • the first clutch 144 is configured to operably couple to the ring gear 13.
  • the CVT 140 has a second clutch 145 operably coupled to the second rotatable shaft 16.
  • the first clutch 144 and the second clutch 145 are typical wet clutches.
  • the CVT 140 has a first synchronizer clutch 146 positioned on the third rotatable shaft 141.
  • the first synchronizer clutch 146 is a two position clutch.
  • the CVT 140 has a second synchronizer clutch 147 positioned on the third rotatable shaft 141.
  • the second synchronizer clutch 147 is a two position clutch.
  • the CVT 140 has a third synchronizer clutch 148 and a fourth synchronizer clutch 149, each positioned on the fourth rotatable shaft
  • the CVT 140 has a fifth synchronizer clutch 150 positioned on the fifth rotatable shaft
  • the fifth synchronizer clutch 150 is a two position clutch.
  • the first synchronizer clutch 146 is configured to selectively engage a first mode gear set 151.
  • the first mode gear set 151 is operably coupled to the first clutch 144.
  • the second synchronizer clutch 147 is configured to selectively engage a second mode gear set 152.
  • the second mode gear set 152 is operably coupled to the second clutch 145.
  • the third synchronizer clutch 148 is configured to selectively engage a third mode gear set 153.
  • the third mode gear set 153 is operably coupled to the first clutch 144.
  • the fourth synchronizer clutch 149 is configured to selectively engage a fourth mode gear set 154.
  • the fourth mode gear set 154 is operably coupled to the second clutch 145.
  • the fifth synchronizer clutch 150 is configured to selectively engage a reverse mode gear set 155.
  • the reverse mode gear set 155 is operably coupled to the third rotatable shaft 141.
  • the CVT 140 includes a final drive gear 156 configured to operably couple to a typical output power coupling, such as a differential.
  • the CVT 140 includes a first-and-second final drive gear set 157 operably coupled to the final drive gear 156.
  • the CVT 140 includes a third-and-fourth final drive gear set 158 operably coupled to the final drive gear 157.
  • a continuously variable transmission comprising: a first rotatable shaft operably coupleable to a source of rotational power; a second rotatable shaft aligned
  • a variator assembly having first and second traction rings in contact with a plurality of traction planets, each traction planet having a tiltable axis of rotation; wherein the variator assembly is coaxial with the main axis; a planetary gearset having a planet carrier, a sun gear, and a ring gear; wherein the sun gear is coupled to the first traction ring, the ring gear is coupled to the second traction ring, and the planet carrier coupled to the first rotatable shaft; a first clutch coupled to the ring gear, the first clutch coaxial with the first rotatable shaft; a second clutch coupled to the sun gear
  • the first synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the third synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the fourth synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the second synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the fifth synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the first clutch is configured to selectively engage a first mode gear set and a third mode gear set.
  • the second clutch is configured to selectively engage a second mode gear set and a fourth mode gear set.
  • the first synchronizer clutch is coupled to the first mode gear set.
  • the second synchronizer clutch is coupled to the second mode gear set.
  • the fifth synchronizer clutch is coupled to a reverse mode gear set.
  • the third synchronizer clutch is coupled to the third mode gear set.
  • the fourth synchronizer clutch is coupled to the fourth mode gear set.
  • the reverse mode gear set is coupled to the third rotatable shaft and the fifth rotatable shaft.
  • the first mode gear set is operably coupled to the first rotatable shaft and the third rotatable shaft.
  • the second mode gear set is operably coupled to the second rotatable shaft and the third rotatable shaft.
  • the third mode gear set is operably coupled to the first rotatable shaft and the fourth rotatable shaft.
  • the fourth mode gear set is operably coupled to the second rotatable shaft and the fourth rotatable shaft.
  • a first and second final drive gear set is provided, the first and second final gear set operably coupled to the third rotatable shaft.
  • a third-fourth final drive gear set is provided, the third-fourth final drive gear set operably coupled to the fourth rotatable shaft.
  • a continuously variable transmission (CVT) 160 includes the powersplit variator 10 operably coupled to the torque converter 21.
  • the CVT 160 includes a third rotatable shaft 161 aligned substantially parallel to the first rotatable shaft 15.
  • the CVT 160 includes a fourth rotatable shaft 162 aligned substantially parallel to the first rotatable shaft 15.
  • the CVT 160 has a first clutch 163 positioned on the second rotatable shaft 16.
  • the first clutch 163 is configured to operably couple to the sun gear 14.
  • the CVT 160 has a second clutch 164 operably coupled to the first rotatable shaft 15.
  • the second clutch 164 is configured to operably couple to the ring gear 13.
  • the first clutch 163 and the second clutch 164 are typical wet clutches.
  • the CVT 160 has a first synchronizer clutch 165 positioned on the third rotatable shaft 161.
  • the first synchronizer clutch 165 is a two position clutch.
  • the CVT 160 has a second synchronizer clutch 166 positioned on the fourth rotatable shaft 162.
  • the second synchronizer clutch 166 is a two position clutch.
  • the CVT 160 has a third synchronizer clutch 167 positioned on the fourth rotatable shaft 162.
  • the CVT 160 has a fourth synchronizer clutch 168 positioned on the third rotatable shaft 161.
  • the first synchronizer clutch 165 is configured to selectively engage a first mode gear set 169.
  • the first mode gear set 169 is operably coupled to the first clutch 163.
  • the second synchronizer clutch 166 is configured to selectively engage a second mode gear set 170.
  • the second mode gear set 170 is operably coupled to the second clutch 164.
  • the third synchronizer clutch 167 is configured to selectively engage a third mode gear set 171.
  • the third mode gear set 171 is operably coupled to the first clutch 163.
  • the fourth synchronizer clutch 168 is configured to selectively engage a reverse mode gear set 172.
  • the reverse mode gear set 172 is operably coupled to the second synchronizer clutch 166.
  • the CVT 160 includes a final drive gear 174 configured to operably couple to a typical output power coupling, such as a differential.
  • the CVT 160 includes a second-and-third final drive gear set 173 operably coupled to the final drive gear 174.
  • a continuously variable transmission comprising: a first rotatable shaft operably coupleable to a source of rotational power; a second rotatable shaft aligned
  • a variator assembly having first and second traction rings in contact with a plurality of traction planets, each traction planet having a tiltable axis of rotation; wherein the variator assembly is coaxial with the main axis; a planetary gearset having a planet carrier, a sun gear, and a ring gear;
  • the sun gear is coupled to the first traction ring, the ring gear is coupled to the second traction ring, and the planet carrier coupled to the first rotatable shaft; a first clutch coupled to the sun gear, the first clutch coaxial with the second rotatable shaft; a second clutch coupled to the ring gear, the second clutch coaxial with the first rotatable shaft; a first synchronizer clutch operably coupled to the first clutch, the first synchronizer clutch coaxial with, and coupled to, the third rotatable shaft; a second synchronizer clutch operably coupled to the second clutch, the second synchronizer clutch coaxial with, and coupled to, the fourth rotatable shaft; a third synchronizer clutch operably coupled to the first clutch, the third synchronizer clutch coaxial with, and coupled to, the fourth rotatable shaft; and a fourth synchronizer clutch operably coupled to the second clutch, the fourth synchronizer coaxial with, and coupled to, the third rotatable shaft.
  • the first synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the third synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the fourth synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the second synchronizer is a two position clutch having a neutral position and an engaged position.
  • the first clutch is configured to selectively engage a first mode gear set and a third mode gear set.
  • the second clutch is configured to selectively engage a second mode gear set and a reverse mode gear set.
  • the first synchronizer clutch is coupled to the first mode gear set.
  • the second clutch is configured to selectively engage a second mode gear set and a reverse mode gear set.
  • the synchronizer clutch is coupled to the second mode gear set. In some embodiments of the continuously variable transmission, the fourth synchronizer clutch is coupled to a reverse mode gear set. In some embodiments of the continuously variable transmission, the third synchronizer clutch is coupled to the third mode gear set. In some embodiments of the continuously variable transmission, the reverse mode gear set is coupled to the third rotatable shaft and the fifth rotatable shaft. In some embodiments of the continuously variable transmission, the first mode gear set is operably coupled to the first rotatable shaft, the third rotatable shaft, and the fourth rotatable shaft. In some embodiments of the continuously variable transmission, the second mode gear set is operably coupled to the first rotatable shaft and the fourth rotatable shaft. In some embodiments of the continuously variable transmission, the third mode gear set is operably coupled to the second rotatable shaft and the fourth rotatable shaft. In some embodiments of the continuously variable transmission, the third mode gear set is operably coupled to the second rotatable shaft and the fourth rotatable shaft. In some
  • a second-and-third final drive gear set is provided, the second-and-third final gear set operably coupled to the fourth rotatable shaft.
  • a final drive gear set is operably coupled to the third rotatable shaft.
  • a continuously variable transmission (CVT) 180 is provided with a variator having the balls 1, the first traction ring assembly 2, and the second traction ring assembly 3.
  • the CVT 180 has a first rotatable shaft 181 configured to couple to a source of rotational power.
  • the CVT 180 has a second rotatable shaft 182 aligned coaxially with the first rotatable shaft 181.
  • the first rotatable shaft 181 and the second rotatable shaft 182 form a main axis of the CVT 180.
  • the CVT 180 is provided with a planetary gear set 183 having a sun gear 184, a planet carrier 185, an array of planet gears 186, and a ring gear 187.
  • the array of planet gears 186 includes a number of stepped gears.
  • the array of planet gears 186 includes a number of straight gears.
  • the planetary gear set 183 is optionally configured to include two sets of planetary gears to accommodate desired operating characteristics of the CVT 180.
  • the planet carrier 185 is coupled to the first rotatable shaft 181.
  • the sun gear 184 is coupled to the second rotatable shaft 182.
  • the first traction ring assembly 2 is coupled to the second rotatable shaft 182.
  • the second traction ring assembly 3 is coupled to the ring gear 187.
  • CVT 180 includes a first clutch 188 (labeled as "CI 3" in FIG. 13) operably coupled to the ring gear 187.
  • the CVT 180 has a second clutch 189 (labeled as "C24" in FIG. 13) operably coupled to the second rotatable shaft 182.
  • the first clutch 188 and the second clutch 189 are coaxial with the main axis of the CVT 180.
  • the CVT 180 has a third rotatable shaft 190 arranged substantially parallel to the main axis.
  • the CVT 180 is provided with a fourth rotatable shaft 191 arranged substantially parallel to the main axis and substantially parallel to the third rotatable shaft 190.
  • the CVT 180 is provided with a fifth rotatable shaft 192 arranged substantially parallel to the main axis, the third rotatable shaft 190, and the fourth rotatable shaft 191.
  • the CVT 180 is provided with a first synchronizer clutch 193 (labeled as "CN1" in FIG. 13) arranged coaxially on the third rotatable shaft 190.
  • the CVT 180 is provided with a second synchronizer clutch 194 (labeled as "CN2" in FIG. 13) arranged coaxially on the third rotatable shaft 190.
  • the CVT 180 is provided with a third synchronizer clutch 195 (labeled as "CN3" in FIG. 13) arranged coaxially on the fourth rotatable shaft 191.
  • the CVT 180 is provided with a fourth synchronizer clutch 196 (labeled as "CN4" in FIG. 13) arranged coaxially on the fourth rotatable shaft 191.
  • the CVT 180 is provided with a fifth synchronizer clutch 197 (labeled as "CN5" in FIG. 13) arranged coaxially on the fifth rotatable shaft 192.
  • the CVT 180 is provided with a first mode gear 198 operably coupled to the first synchronizer clutch 193.
  • the first mode gear 198 is coaxial with the third rotatable shaft 190.
  • the first mode gear 198 engages a first-and-third- mode drive gear 199.
  • the first-and-third-mode drive gear 199 is operably coupled to the first clutch 188.
  • the CVT 180 is provided with a third mode drive gear 200 coupled to the first-and- third-mode drive gear 199.
  • the third mode gear 200 is coupled to the third synchronizer clutch
  • the third mode gear 200 is coaxial with the fourth rotatable shaft 191.
  • the CVT 180 is provided with a second mode gear 201 coupled with the second synchronizer clutch 194.
  • the second mode gear 201 is coaxial with the third rotatable shaft 190.
  • the second mode gear 201 is coupled to a second-and-fourth mode drive gear 202.
  • the second- and-fourth mode drive gear 202 is operably coupled to the second clutch 189 and coaxial with the second rotatable shaft 182.
  • the second-and-fourth mode drive gear 202 is coupled to a fourth mode gear 203.
  • the fourth mode gear 203 is coupled to the fourth synchronizer clutch
  • the fourth mode gear 203 is coaxial with the fourth rotatable shaft 191.
  • the CVT 180 is provided with a first reverse gear 204 coupled to the fifth synchronizer clutch 197.
  • the first reverse gear 204 is coaxial with the fifth rotatable shaft 192.
  • the first reverse gear 204 is coupled to a second reverse gear 205.
  • the second reverse gear 205 is operably coupled to a fifth synchronizer clutch 197.
  • the second reverse gear 205 is coaxial with the third rotatable shaft 190.
  • the CVT 180 is provided with a first final drive gear 206 coupled to the third rotatable shaft 190.
  • the CVT 180 is provided with a second final drive gear 207 coupled to the fourth rotatable shaft 191.
  • the CVT 180 is provided with a third final drive gear 208 configured to provide an output power.
  • the CVT 180 is provided with a final reverse drive gear 209 coupled to the fifth rotatable shaft 192.
  • the first synchronizer clutch 193, the second synchronizer clutch 194, the third synchronizer clutch 195, the fourth synchronizer clutch 196, and the fifth synchronizer clutch 197 are two-position clutches.
  • a first mode of operation corresponds to the engagement of the first clutch 188 and the engagement of the first synchronizer clutch 193.
  • a second mode of operation corresponds to the engagement of the second clutch 189 and the second synchronizer clutch 194.
  • a third mode of operation corresponds to the engagement of the first clutch 188 and the third synchronizer clutch 195.
  • a fourth mode of operation corresponds to the engagement of the second clutch 189 and the fourth synchronizer clutch 196.
  • a reverse mode of operation corresponds to the engagement of the second clutch 189 and the fifth synchronizer clutch 197.
  • a continuously variable transmission comprising: a first rotatable shaft operably coupleable to a source of rotational power; a second rotatable shaft aligned coaxial to the first rotatable shaft, the first rotatable shaft and second rotatable shaft forming a main axis of the transmission; a third rotatable shaft aligned parallel to the main axis; a fourth rotatable shaft aligned parallel to the main axis; a variator assembly having first and second traction rings in contact with a plurality of traction planets, each traction planet having a tiltable axis of rotation; wherein the variator assembly is coaxial with the main axis; a planetary gearset having a planet carrier, a sun gear, an array of planet gears coupled to the planet carrier, and a ring gear; wherein the sun gear is coupled to the first traction ring, the ring gear is coupled to the second traction ring, and the planet carrier coupled to the first rot
  • the first synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the third synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the fourth synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • the second synchronizer is a two position clutch having a neutral position and an engaged position.
  • a fifth rotatable shaft is arranged parallel to the main axis. In some embodiments of the continuously variable transmission, a fifth synchronizer clutch is coupled to the fifth rotatable shaft.
  • the array of planet gears comprise a plurality of stepped gears. In some embodiments of the continuously variable transmission, the array of planet gears comprises a plurality of straight gears. In some embodiments of the continuously variable transmission, a first-and-third mode drive gear coupled to the first clutch, wherein the first-and-third mode drive gear is operably coupled to the first synchronizer clutch and the third synchronizer clutch. In some embodiments of the continuously variable transmission, a second-and-fourth mode drive gear coupled to the second clutch, wherein the second-and-fourth mode drive gear is operably coupled to the second synchronizer and the fourth synchronizer.
  • a first mode of operation corresponds to an engagement of the first clutch and the first synchronizer clutch.
  • a second mode of operation corresponds to an engagement of the second clutch and the second synchronizer clutch.
  • a third mode of operation corresponds to an engagement of the first clutch and the third synchronizer clutch.
  • a fourth mode of operation corresponds to an engagement of the second clutch and the fourth synchronizer clutch.
  • a reverse mode of operation corresponds to an engagement of the continuously variable transmission.
  • a continuously variable transmission comprising:
  • a first rotatable shaft operably coupleable to a source of rotational power
  • a second rotatable shaft aligned substantially coaxial to the first rotatable shaft, the first rotatable shaft and second rotatable shaft forming a main axis of the transmission;
  • a variator assembly having first and second traction rings in contact with a plurality of traction planets, each traction planet having a tiltable axis of rotation;
  • the variator assembly is coaxial with the main axis
  • a planetary gearset having a planet carrier, a sun gear, and a ring gear
  • the sun gear is coupled to the first traction ring
  • the ring gear is coupled to the second traction ring
  • the planet carrier coupled to the first rotatable shaft
  • first clutch coupled to the ring gear, the first clutch coaxial with the first rotatable shaft;
  • second clutch coupled to the sun gear, the second clutch coaxial with the second rotatable shaft;
  • a first synchronizer clutch operably coupled to the first clutch, the first synchronizer clutch coaxial with, and coupled to, the third rotatable shaft;
  • a second synchronizer clutch operably coupled to the second clutch, the second synchronizer clutch coaxial with, and coupled to, the third rotatable shaft; a third synchronizer clutch operably coupled to the first clutch, the third synchronizer clutch coaxial with, and coupled to, the fourth rotatable shaft; and
  • a fourth synchronizer clutch operably coupled to the second clutch, the fourth synchronizer coaxial with, and coupled to, the fourth rotatable shaft.
  • Aspect 2 The continuously variable transmission of Aspect 1, wherein the first synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • Aspect 3 The continuously variable transmission of Aspect 2, wherein the third synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • Aspect 4 The continuously variable transmission of Aspect 3, wherein the fourth synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • Aspect 5 The continuously variable transmission of Aspect 4, wherein the second synchronizer clutch is a three position clutch having a neutral position, a first engaged position, and a second engaged position.
  • Aspect 6 The continuously variable transmission of Aspect 5, wherein the first clutch is configured to selectively engage a first mode gear set and a third mode gear set.
  • Aspect 7 The continuously variable transmission of Aspect 6, wherein the second clutch is configured to selectively engage a second mode gear set and a fourth mode gear set.
  • Aspect 8 The continuously variable transmission of Aspect 7, wherein the first synchronizer clutch is coupled to the first mode gear set.
  • Aspect 9 The continuously variable transmission of Aspect 8, wherein the second synchronizer clutch is coupled to the second mode gear set.
  • Aspect 10 The continuously variable transmission of Aspect 9, wherein the second synchronizer clutch is coupled to a reverse mode gear set.
  • Aspect 11 The continuously variable transmission of Aspect 10, wherein the third synchronizer clutch is coupled to the third mode gear set.
  • Aspect 12 The continuously variable transmission of Aspect 11, wherein the fourth synchronizer clutch is coupled to the fourth mode gear set.
  • Aspect 13 The continuously variable transmission of Aspect 12, wherein the reverse mode gear set is coupled to the third rotatable shaft and the fifth rotatable shaft.
  • Aspect 14 The continuously variable transmission of Aspect 13, wherein the first mode gear set is operably coupled to the first rotatable shaft, the third rotatable shaft, and the fifth rotatable shaft.
  • Aspect 15 The continuously variable transmission of Aspect 14, wherein the second mode gear set is operably coupled to the second rotatable shaft, the third rotatable shaft, and the fifth rotatable shaft.
  • Aspect 16 The continuously variable transmission of Aspect 15, wherein the third mode gear set is operably coupled to the first rotatable shaft and the fourth rotatable shaft.
  • Aspect 17 The continuously variable transmission of Aspect 16, wherein the fourth mode gear set is operably coupled to the second rotatable shaft and the fourth rotatable shaft.
  • Aspect 18 The continuously variable transmission of Aspect 17, further comprising a first-second-reverse final drive gear set, the first- second-reverse final gear set operably coupled to the fifth rotatable shaft.
  • Aspect 19 The continuously variable transmission of Aspect 18, further comprising a third-fourth final drive gear set, the third-fourth final drive gear set operably coupled to the fourth rotatable shaft.
  • a continuously variable transmission comprising:
  • a first rotatable shaft operably coupleable to a source of rotational power
  • a second rotatable shaft aligned substantially coaxial to the first rotatable shaft, the first rotatable shaft and second rotatable shaft forming a main axis of the transmission;
  • a variator assembly having first and second traction rings in contact with a plurality of traction planets, each traction planet having a tiltable axis of rotation;
  • the variator assembly is coaxial with the main axis
  • a planetary gearset having a planet carrier, a sun gear, and a ring gear
  • the sun gear is coupled to the first traction ring
  • the ring gear is coupled to the second traction ring
  • the planet carrier coupled to the first rotatable shaft
  • first clutch coupled to the ring gear, the first clutch coaxial with the first rotatable shaft; a second clutch coaxial with the third rotatable shaft;
  • a third clutch operably coupled to the first rotatable shaft
  • a first synchronizer clutch coaxial with, and coupled to, the third rotatable shaft
  • a second synchronizer clutch operably coupled to the sun gear, the second synchronizer clutch coaxial with, and coupled to, the second rotatable shaft, the second synchronizer clutch operably coupled to the second clutch;
  • a third synchronizer clutch coaxial with, and coupled to, the third rotatable shaft
  • Aspect 21 The continuously variable transmission of Aspect 20, wherein the first synchronizer clutch is a three position clutch having a neutral position, a first engaged position, and a second engaged position.
  • Aspect 22 The continuously variable transmission of Aspect 21, wherein the second synchronizer clutch is a three position clutch having a neutral position, a first engaged position, and a second engaged position.
  • Aspect 23 The continuously variable transmission of Aspect 22, wherein the third synchronizer clutch is a three position clutch having a neutral position, a first engaged position, and a second engaged position.
  • Aspect 24 The continuously variable transmission of Aspect 23, wherein the fourth synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • Aspect 25 The continuously variable transmission of Aspect 24, wherein the first synchronizer clutch is coupled to a first mode gear set.
  • Aspect 26 The continuously variable transmission of Aspect 25, wherein the first synchronizer clutch is coupled to a third mode gear set.
  • Aspect 27 The continuously variable transmission of Aspect 26, wherein the second synchronizer clutch is coupled to a fourth mode gear set.
  • Aspect 28 The continuously variable transmission of Aspect 27, wherein the third synchronizer clutch is coupled to a reverse mode gear set.
  • Aspect 29 The continuously variable transmission of Aspect 28, wherein the third synchronizer clutch is coupled to a launch mode gear set.
  • Aspect 30 The continuously variable transmission of Aspect 29, wherein the fourth synchronizer clutch is coupled to an overdrive mode gear set.
  • Aspect 31 The continuously variable transmission of Aspect 30, wherein the first clutch is coupled to the first mode gear set and the third mode gear set.
  • Aspect 32 The continuously variable transmission of Aspect 31, wherein the second clutch is coupled to the second mode gear set and the fourth mode gear set.
  • Aspect 33 The continuously variable transmission of Aspect 32, wherein the third clutch is operably coupled to the overdrive mode gear set and the launch mode gear set.
  • a continuously variable transmission comprising:
  • a first rotatable shaft operably coupleable to a source of rotational power
  • a second rotatable shaft aligned substantially coaxial to the first rotatable shaft, the first rotatable shaft and second rotatable shaft forming a main axis of the transmission;
  • a third rotatable shaft aligned substantially parallel to the main axis; a variator assembly having first and second traction rings in contact with a plurality of traction planets, each traction planet having a tiltable axis of rotation;
  • the variator assembly is coaxial with the main axis
  • a planetary gearset having a planet carrier, a sun gear, and a ring gear
  • the sun gear is coupled to the first traction ring
  • the ring gear is coupled to the second traction ring
  • the planet carrier coupled to the first rotatable shaft
  • first clutch coupled to the ring gear, the first clutch coaxial with the first rotatable shaft; a second clutch coaxial with, and coupled to, the third rotatable shaft;
  • a first synchronizer clutch coaxial with, and coupled to, the third rotatable shaft; and a second synchronizer clutch coaxial with, and coupled to, the third rotatable shaft.
  • Aspect 35 The continuously variable transmission of Aspect 34, wherein the first synchronizer clutch is a three position clutch having a neutral position, a first engaged position, and a second engaged position.
  • Aspect 36 The continuously variable transmission of Aspect 35, wherein the second synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • Aspect 37 The continuously variable transmission of Aspect 36, wherein the first synchronizer clutch is coupled to a first mode gear set.
  • Aspect 38 The continuously variable transmission of Aspect 37, wherein the first synchronizer clutch is coupled to a third mode gear set.
  • Aspect 39 The continuously variable transmission of Aspect 38, wherein the second clutch is coupled to a second mode gear set.
  • Aspect 40 The continuously variable transmission of Aspect 39, wherein the second mode gear set is coupled to the sun gear.
  • Aspect 41 The continuously variable transmission of Aspect 40, wherein the second synchronizer clutch is coupled to a reverse mode gear set.
  • Aspect 42 The continuously variable transmission of Aspect 41, further comprising a final drive gear set coupled to the third rotatable shaft.
  • a continuously variable transmission comprising:
  • a first rotatable shaft operably coupleable to a source of rotational power
  • a second rotatable shaft aligned substantially coaxial to the first rotatable shaft, the first rotatable shaft and second rotatable shaft forming a main axis of the transmission;
  • a fourth rotatable shaft aligned substantially parallel to the main axis; a variator assembly having first and second traction rings in contact with a plurality of traction planets, each traction planet having a tiltable axis of rotation;
  • the variator assembly is coaxial with the main axis
  • a planetary gearset having a planet carrier, a sun gear, and a ring gear
  • the sun gear is coupled to the first traction ring
  • the ring gear is coupled to the second traction ring
  • the planet carrier coupled to the first rotatable shaft
  • first clutch coupled to the ring gear, the first clutch coaxial with the first rotatable shaft;
  • second clutch coupled to the sun gear, the second clutch coaxial with, and coupled to, the second rotatable shaft;
  • a third clutch coaxial with, and coupled to, the first rotatable shaft
  • a first synchronizer clutch coaxial with, and coupled to, the third rotatable shaft
  • a second synchronizer clutch coaxial with, and coupled to, the third rotatable shaft
  • a third synchronizer clutch coaxial with, and coupled to, the fourth rotatable shaft; and a fourth synchronizer clutch coaxial with, and coupled to, the fourth rotatable shaft.
  • Aspect 44 The continuously variable transmission of Aspect 43, wherein the first synchronizer clutch is a three position clutch having a neutral position, a first engaged position, and a second engaged position.
  • Aspect 45 The continuously variable transmission of Aspect 44, wherein the second synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • Aspect 46 The continuously variable transmission of Aspect 45, wherein the third synchronizer clutch is a three position clutch having a neutral position, a first engaged position, and a second engaged position.
  • Aspect 47 The continuously variable transmission of Aspect 46, wherein the fourth synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • Aspect 48 The continuously variable transmission of Aspect 47, wherein the fifth synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • Aspect 49 The continuously variable transmission of Aspect 48, wherein the first clutch is configured to selectively engage a first mode gear set and a third mode gear set.
  • Aspect 50 The continuously variable transmission of Aspect 49, wherein the second clutch is configured to selectively engage a second mode gear set and a fourth mode gear set.
  • Aspect 51 The continuously variable transmission of Aspect 50, wherein the first synchronizer clutch is coupled to the first mode gear set.
  • Aspect 52 The continuously variable transmission of Aspect 51, wherein the first synchronizer clutch is coupled to an overdrive mode gear set.
  • Aspect 53 The continuously variable transmission of Aspect 52, wherein the second synchronizer clutch is coupled to the second mode gear set.
  • Aspect 54 The continuously variable transmission of Aspect 53, wherein the third synchronizer clutch is coupled to the third mode gear set.
  • Aspect 55 The continuously variable transmission of Aspect 54, wherein the third synchronizer clutch is coupled to a reverse mode gear set.
  • Aspect 56 The continuously variable transmission of Aspect 55, wherein the fourth synchronizer clutch is coupled to the fourth mode gear set.
  • Aspect 57 The continuously variable transmission of Aspect 56, wherein the fifth synchronizer clutch is coupled to a launch mode gear set.
  • Aspect 58 The continuously variable transmission of Aspect 57, wherein the third clutch is configured to selectively engage the launch mode gear set and the reverse mode gear set.
  • a continuously variable transmission comprising:
  • a first rotatable shaft operably coupleable to a source of rotational power
  • a second rotatable shaft aligned substantially coaxial to the first rotatable shaft, the first rotatable shaft and second rotatable shaft forming a main axis of the transmission;
  • a variator assembly having first and second traction rings in contact with a plurality of traction planets, each traction planet having a tiltable axis of rotation;
  • the variator assembly is coaxial with the main axis
  • a planetary gearset having a planet carrier, a sun gear, and a ring gear
  • the sun gear is coupled to the first traction ring
  • the ring gear is coupled to the second traction ring
  • the planet carrier coupled to the first rotatable shaft
  • first clutch coupled to the ring gear, the first clutch coaxial with the first rotatable shaft; a second clutch coaxial with, and coupled to, the third rotatable shaft;
  • a first synchronizer clutch coaxial with, and coupled to, the third rotatable shaft; and a second synchronizer clutch coaxial with, and coupled to, the fourth rotatable shaft.
  • Aspect 60 The continuously variable transmission of Aspect 59, wherein the first synchronizer clutch is a three position clutch having a neutral position, a first engaged position, and a second engaged position.
  • Aspect 61 The continuously variable transmission of Aspect 60, wherein the second synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • Aspect 62 The continuously variable transmission of Aspect 61, wherein the first synchronizer clutch is coupled to a first mode gear set.
  • Aspect 63 The continuously variable transmission of Aspect 62, wherein the first synchronizer clutch is coupled to a third mode gear set.
  • Aspect 64 The continuously variable transmission of Aspect 63, wherein the second clutch is coupled to a second mode gear set.
  • Aspect 65 The continuously variable transmission of Aspect 64, wherein the second synchronizer clutch is coupled to a reverse mode gear set.
  • Aspect 66 The continuously variable transmission of Aspect 65, further comprising a forward final drive gear set operably coupled to the third rotatable shaft.
  • Aspect 67 The continuously variable transmission of Aspect 66, further comprising a reverse final drive gear set operably coupled to the fourth rotatable shaft.
  • a continuously variable transmission comprising:
  • a first rotatable shaft operably coupleable to a source of rotational power
  • a second rotatable shaft aligned substantially coaxial to the first rotatable shaft, the first rotatable shaft and second rotatable shaft forming a main axis of the transmission;
  • a variator assembly having first and second traction rings in contact with a plurality of traction planets, each traction planet having a tiltable axis of rotation;
  • the variator assembly is coaxial with the main axis
  • a planetary gearset having a planet carrier, a sun gear, and a ring gear
  • the sun gear is coupled to the first traction ring
  • the ring gear is coupled to the second traction ring
  • the planet carrier coupled to the first rotatable shaft
  • first clutch coupled to the ring gear, the first clutch coaxial with the first rotatable shaft;
  • second clutch coupled to the sun gear, the second clutch coaxial with the second rotatable shaft;
  • a first synchronizer clutch operably coupled to the first clutch, the first synchronizer clutch coaxial with, and coupled to, the third rotatable shaft;
  • a second synchronizer clutch operably coupled to the second clutch, the second synchronizer clutch coaxial with, and coupled to, the third rotatable shaft;
  • a third synchronizer clutch operably coupled to the first clutch, the third synchronizer clutch coaxial with, and coupled to, the fourth rotatable shaft; a fourth synchronizer clutch operably coupled to the second clutch, the fourth synchronizer coaxial with, and coupled to, the fourth rotatable shaft; and
  • a fifth synchronizer clutch operably coupled to the second clutch, the fifth synchronizer coaxial with, and operably coupled to the fifth rotatable shaft.
  • Aspect 69 The continuously variable transmission of Aspect 68, wherein the first synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • Aspect 70 The continuously variable transmission of Aspect 69, wherein the third synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • Aspect 71 The continuously variable transmission of Aspect 70, wherein the fourth synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • Aspect 72 The continuously variable transmission of Aspect 71, wherein the second synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • Aspect 73 The continuously variable transmission of Aspect 72, wherein the fifth synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • Aspect 74 The continuously variable transmission of Aspect 73, wherein the first clutch is configured to selectively engage a first mode gear set and a third mode gear set.
  • Aspect 75 The continuously variable transmission of Aspect 74, wherein the second clutch is configured to selectively engage a second mode gear set and a fourth mode gear set.
  • Aspect 76 The continuously variable transmission of Aspect 75, wherein the first synchronizer clutch is coupled to the first mode gear set.
  • Aspect 77 The continuously variable transmission of Aspect 76, wherein the second synchronizer clutch is coupled to the second mode gear set.
  • Aspect 78 The continuously variable transmission of Aspect 77, wherein the fifth synchronizer clutch is coupled to a reverse mode gear set.
  • Aspect 79 The continuously variable transmission of Aspect 78, wherein the third synchronizer clutch is coupled to the third mode gear set.
  • Aspect 80 The continuously variable transmission of Aspect 79, wherein the fourth synchronizer clutch is coupled to the fourth mode gear set.
  • Aspect 81 The continuously variable transmission of Aspect 80, wherein the reverse mode gear set is coupled to the third rotatable shaft and the fifth rotatable shaft.
  • Aspect 82 The continuously variable transmission of Aspect 81, wherein the first mode gear set is operably coupled to the first rotatable shaft and the third rotatable shaft..
  • Aspect 83 The continuously variable transmission of Aspect 82, wherein the second mode gear set is operably coupled to the second rotatable shaft and the third rotatable shaft.
  • Aspect 84 The continuously variable transmission of Aspect 83, wherein the third mode gear set is operably coupled to the first rotatable shaft and the fourth rotatable shaft.
  • Aspect 85 The continuously variable transmission of Aspect 84, wherein the fourth mode gear set is operably coupled to the second rotatable shaft and the fourth rotatable shaft.
  • Aspect 86 The continuously variable transmission of Aspect 85, further comprising a first and second final drive gear set, the first and second final gear set operably coupled to the third rotatable shaft.
  • Aspect 87 The continuously variable transmission of Aspect 86, further comprising a third-fourth final drive gear set, the third-fourth final drive gear set operably coupled to the fourth rotatable shaft.
  • a continuously variable transmission comprising:
  • a first rotatable shaft operably coupleable to a source of rotational power
  • a second rotatable shaft aligned substantially coaxial to the first rotatable shaft, the first rotatable shaft and second rotatable shaft forming a main axis of the transmission;
  • a variator assembly having first and second traction rings in contact with a plurality of traction planets, each traction planet having a tiltable axis of rotation;
  • the variator assembly is coaxial with the main axis
  • a planetary gearset having a planet carrier, a sun gear, and a ring gear
  • the sun gear is coupled to the first traction ring
  • the ring gear is coupled to the second traction ring
  • the planet carrier coupled to the first rotatable shaft
  • a second clutch coupled to the ring gear, the second clutch coaxial with the first rotatable shaft
  • a first synchronizer clutch operably coupled to the first clutch, the first synchronizer clutch coaxial with, and coupled to, the third rotatable shaft;
  • a second synchronizer clutch operably coupled to the second clutch, the second synchronizer clutch coaxial with, and coupled to, the fourth rotatable shaft;
  • a third synchronizer clutch operably coupled to the first clutch, the third synchronizer clutch coaxial with, and coupled to, the fourth rotatable shaft;
  • Aspect 89 The continuously variable transmission of Aspect 88, wherein the first synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • Aspect 90 The continuously variable transmission of Aspect 89, wherein the third synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • Aspect 91 The continuously variable transmission of Aspect 90, wherein the fourth synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • Aspect 92 The continuously variable transmission of Aspect 91, wherein the second synchronizer is a two position clutch having a neutral position and an engaged position.
  • Aspect 93 The continuously variable transmission of Aspect 92, wherein the first clutch is configured to selectively engage a first mode gear set and a third mode gear set.
  • Aspect 94 The continuously variable transmission of Aspect 93, wherein the second clutch is configured to selectively engage a second mode gear set and a reverse mode gear set.
  • Aspect 95 The continuously variable transmission of Aspect 94, wherein the first synchronizer clutch is coupled to the first mode gear set.
  • Aspect 96 The continuously variable transmission of Aspect 95, wherein the second synchronizer clutch is coupled to the second mode gear set.
  • Aspect 97 The continuously variable transmission of Aspect 96, wherein the fourth synchronizer clutch is coupled to a reverse mode gear set.
  • Aspect 98 The continuously variable transmission of Aspect 97, wherein the third synchronizer clutch is coupled to the third mode gear set.
  • Aspect 99 The continuously variable transmission of Aspect 98, wherein the reverse mode gear set is coupled to the third rotatable shaft and the fifth rotatable shaft.
  • Aspect 100 The continuously variable transmission of Aspect 99, wherein the first mode gear set is operably coupled to the first rotatable shaft, the third rotatable shaft, and the fourth rotatable shaft.
  • Aspect 101 The continuously variable transmission of Aspect 100, wherein the second mode gear set is operably coupled to the first rotatable shaft and the fourth rotatable shaft.
  • Aspect 102 The continuously variable transmission of Aspect 101, wherein the third mode gear set is operably coupled to the second rotatable shaft and the fourth rotatable shaft.
  • Aspect 103 The continuously variable transmission of Aspect 102, further comprising a second-and-third final drive gear set, the second and third final gear set operably coupled to the fourth rotatable shaft.
  • Aspect 104 The continuously variable transmission of Aspect 103, further comprising a final drive gear set operably coupled to the third rotatable shaft.
  • Aspect 105 A continuously variable transmission comprising:
  • a first rotatable shaft operably coupleable to a source of rotational power
  • a second rotatable shaft aligned coaxial to the first rotatable shaft, the first rotatable shaft and second rotatable shaft forming a main axis of the transmission;
  • a variator assembly having first and second traction rings in contact with a plurality of traction planets, each traction planet having a tiltable axis of rotation;
  • the variator assembly is coaxial with the main axis
  • a planetary gearset having a planet carrier, a sun gear, an array of planet gears coupled to the planet carrier, and a ring gear;
  • the sun gear is coupled to the first traction ring
  • the ring gear is coupled to the second traction ring
  • the planet carrier coupled to the first rotatable shaft
  • first clutch coupled to the ring gear, the first clutch coaxial with the first rotatable shaft;
  • second clutch coupled to the sun gear, the second clutch coaxial with the second rotatable shaft;
  • a first synchronizer clutch operably coupled to the first clutch, the first synchronizer clutch coaxial with, and coupled to, the third rotatable shaft;
  • a second synchronizer clutch operably coupled to the second clutch, the second synchronizer clutch coaxial with, and coupled to, the third rotatable shaft;
  • a third synchronizer clutch operably coupled to the first clutch, the third synchronizer clutch coaxial with, and coupled to, the fourth rotatable shaft;
  • a fourth synchronizer clutch operably coupled to the second clutch, the fourth
  • Aspect 106 The continuously variable transmission of Aspect 105, wherein the first synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • Aspect 107 The continuously variable transmission of Aspect 106, wherein the third synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • Aspect 108 The continuously variable transmission of Aspect 107, wherein the fourth synchronizer clutch is a two position clutch having a neutral position and an engaged position.
  • Aspect 109 The continuously variable transmission of Aspect 108, wherein the second synchronizer is a two position clutch having a neutral position and an engaged position.
  • Aspect 110 The continuously variable transmission of Aspect 109, further comprising a fifth rotatable shaft arranged parallel to the main axis.
  • Aspect 111 The continuously variable transmission of Aspect 110, further comprising a fifth synchronizer clutch coupled to the fifth rotatable shaft.
  • Aspect 112 The continuously variable transmission of Aspect 111, wherein the array of planet gears comprise a plurality of stepped gears.
  • Aspect 113 The continuously variable transmission of Aspect 112, wherein the array of planet gears comprise a plurality of straight gears.
  • Aspect 114 The continuously variable transmission of Aspect 113, further comprising a first-and-third mode drive gear coupled to the first clutch, wherein the first-and-third mode drive gear is operably coupled to the first synchronizer clutch and the third synchronizer clutch.
  • Aspect 115 The continuously variable transmission of Aspect 114, further comprising a second-and-fourth mode drive gear coupled to the second clutch, wherein the second-and-fourth mode drive gear is operably coupled to the second synchronizer and the fourth synchronizer.
  • Aspect 116 The continuously variable transmission of Aspect 115, wherein a first mode of operation corresponds to an engagement of the first clutch and the first synchronizer clutch.
  • Aspect 117 The continuously variable transmission of Aspect 116, wherein a second mode of operation corresponds to an engagement of the second clutch and the second synchronizer clutch.
  • Aspect 118 The continuously variable transmission of Aspect 117, wherein a third mode of operation corresponds to an engagement of the first clutch and the third synchronizer clutch.
  • Aspect 119 The continuously variable transmission of Aspect 118, wherein a fourth mode of operation corresponds to an engagement of the second clutch and the fourth
  • Aspect 120 The continuously variable transmission of Aspect 119, wherein a reverse mode of operation corresponds to an engagement of the second clutch and the fifth synchronizer clutch.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Friction Gearing (AREA)
  • Transmission Devices (AREA)

Abstract

L'invention concerne des dispositifs et des procédés pour la transmission de puissance dans des véhicules à moteur. La puissance peut être transmise d'une manière plus régulière et efficace au moyen de la répartition du couple entre deux ou plusieurs trajectoires de couple. Une transmission à variation de vitesse continue est munie d'un ensemble variateur à bille, d'un train d'engrenages planétaires accouplé audit ensemble et d'un agencement d'arbres rotatifs à plusieurs engrenages et embrayages destinés à augmenter la plage de rapports du variateur. Dans certains modes de réalisation, des embrayages de synchronisation sont accouplés aux trains d'engrenages afin de permettre une présélection des modes de transmission. L'invention concerne également une dérivation CVP de démarrage, une dérivation CVP de marche arrière et une dérivation CVP de roulement à régime permanent et à vitesse maximale optionnelle.
PCT/US2016/059131 2015-10-29 2016-10-27 Configurations de groupe motopropulseur multimode dotées de transmission à variation de vitesse continue munie de variateur à bille, utilisées comme répartition de puissance WO2017075225A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201562247854P 2015-10-29 2015-10-29
US62/247,854 2015-10-29
US201662291668P 2016-02-05 2016-02-05
US62/291,668 2016-02-05

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WO2017075225A1 true WO2017075225A1 (fr) 2017-05-04

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PCT/US2016/059131 WO2017075225A1 (fr) 2015-10-29 2016-10-27 Configurations de groupe motopropulseur multimode dotées de transmission à variation de vitesse continue munie de variateur à bille, utilisées comme répartition de puissance

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060276290A1 (en) * 2005-06-03 2006-12-07 Fabry Mark D Multi-range hydromechanical transmission
US20130210569A1 (en) * 2012-02-10 2013-08-15 GM Global Technology Operations LLC Compound planetary front wheel drive continuously variable transmission
US20140274540A1 (en) * 2013-03-15 2014-09-18 Allison Transmission, Inc. Split power infinitely variable transmission architecture
US20150204430A1 (en) * 2012-09-07 2015-07-23 Dana Limited Ball type cvt with powersplit paths

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060276290A1 (en) * 2005-06-03 2006-12-07 Fabry Mark D Multi-range hydromechanical transmission
US20130210569A1 (en) * 2012-02-10 2013-08-15 GM Global Technology Operations LLC Compound planetary front wheel drive continuously variable transmission
US20150204430A1 (en) * 2012-09-07 2015-07-23 Dana Limited Ball type cvt with powersplit paths
US20140274540A1 (en) * 2013-03-15 2014-09-18 Allison Transmission, Inc. Split power infinitely variable transmission architecture

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