Patent ID: 6974401
Filing Date: 2005-12-13
Classification: F16H

Abstract:
1. A planetary gear arrangement comprising: three rotatable members, a first of which is a planet carrier assembly member having at least a planet carrier member and a plurality of pinion gear members rotatably mounted on said planet carrier member, a second of said rotatable members being disposed in meshing engagement with at least one of said pinion gear members, a third of said rotatable members being disposed in meshing engagement with at least one of said pinion gear members; a selectively engageable active friction damper means comprised of a normally disengaged torque transmitting mechanism disposed between and adapted to selectively apply a frictional engagement between at least two of said rotatable members within an individual planetary gear arrangement during a torque reversal through said planetary gear arrangement; means for selectively activating said active friction damper for engagment in anticipation of a lash change between said rotatable members to minimize lash within said individual planetary gear arrangement prior to a torque reversal associated with a gear change event or other transient driveline disturbance to provide frictional damping and minimize noise.