Patent ID: 6059685
Filing Date: 2000-05-09
Classification: F16H

Abstract:
A traction drive transmission for motor vehicles, comprising:an input shaft;an output shaft;a traction drive variator including a first input disc driveably connected to the input shaft, a second input disc spaced from the first input disc, an output disc spaced from the first and second input discs, a first roller driveably engaging the first input disc and output disc at variable radial positions, a second roller driveably engaging the second input disc and output disc at variable radial positions;a first gear unit having a first sun gear driveably connected to the output disc, a second sun gear, a first ring gear, a first carrier driveably connected to the input shaft, a first planet pinion rotatably supported on the first carrier and driveably engaged with the first sun gear and second sun gear, a second planet pinion rotatably supported on the first carrier and driveably engaged with the first planet pinion and first ring gear;a second gear unit having a third sun gear, a second ring gear, a second carrier driveably connected to the output shaft, a third planet pinion rotatably supported on the second carrier and driveably engaged with the third sun gear, a fourth planet pinion rotatably supported on the second carrier and driveably engaged with the second ring gear and third planet pinion;a first clutch for alternately driveably connecting and disconnecting the first ring gear and second carrier; anda second clutch for alternately driveably connecting and disconnecting the second and third sun gears.