Symmetric Infinitely Variable Transmission Having A Ball-Type Continuously Variable Transmission

A powertrain comprising:

• a main shaft;
• a variator having a first plurality of balls, each ball provided with a tillable axis of rotation, each ball in contact with a first traction ring assembly and a second traction ring assembly, and each ball operably coupled to a first carrier assembly;
• a first planetary gear set having a first ring gear, a first planet carrier supporting a first plurality of planet gears coupled to the first ring gear, and a first sun gear coupled to the first plurality of the planet gears;
• and
• a second planetary gear set having a second ring gear, a second planet carrier supporting a second plurality of planet gears coupled to the second ring gear, and a second sun gear coupled to the second plurality of the planet gears,
• wherein the first traction ring assembly is configured to receive a rotational power, the first traction ring assembly is operably coupled to the second sun gear,
• wherein the second traction ring assembly is operably coupled to the first ring gear,
• wherein the first planet carrier is operably coupled to the second planet carrier, and
• wherein the first sun gear is operably coupled to ground.