Patent ID: 9017204
Filing Date: 2015-04-28
Classification: B60K,F16H,Y10T

Abstract:
1. A continuously variable transmission for transmitting drive torque from a powertrain to a driveline in a motor vehicle, the continuously variable transmission comprising: a compound planetary gearset including a sun gear being driven by the powertrain, a ring gear, a carrier driving the driveline, a first pinion gear supported by said carrier and in meshed engagement with said sun gear, and a second pinion gear rotatably supported by said carrier and meshed with said ring gear; a reaction motor driving said ring gear; a control system for controlling said reaction motor to vary a rotary speed of said ring gear and establish a gear ratio between said sun gear and said carrier based on the speed of said ring gear, wherein a ratio of sun gear speed to carrier speed versus a ratio of ring gear speed to sun gear speed is asymptotic; a first input shaft interconnecting the powertrain to said sun gear; a second input shaft interconnecting said reaction motor to said ring gear; and an output shaft interconnecting said carrier to the driveline, wherein said reaction motor surrounds said output shaft such that said second input shaft is concentric relative to said output shaft.