ELECTRIC BIKE POWERTRAIN WITH DUAL PLANETARY GEAR SETS AND RING GEAR PEDAL REACTION TORQUE MEASUREMENT

摘要

A number of variations may include an electric cycle powertrain havinga first planetary gear set and a second planetary gear set, wherein the secondplanetary gear set is constructed and arranged to selectively overdrive apedal cadence and wherein the first planetary gear set is constructed andarranged to selectively provide additional gear ratio for a motor.