Patent ID: 6165097
Filing Date: 2000-12-26
Classification: F16H

Abstract:
A planetary transmission comprising:an input shaft;an output shaft;a simple planetary gear set having a sun gear member, a ring gear member and a carrier assembly member;a compound planetary gear set having a sun gear member, a ring gear member and a carrier assembly member, said sun gear member being continuously connected with said sun gear member of said simple planetary gear set, and said ring gear being continuously connected with said output shaft;a first selectively engageable clutch to selectively connect said carrier assembly member of said simple planetary gear set with said input shaft;a second selectively engageable clutch to selectively connect said ring gear member of said simple planetary gear set with said input shaft;a third selectively engageable clutch to selectively interconnect said ring gear member of said simple planetary gear set and said carrier assembly member of said compound planetary gear set;a fourth selectively engageable clutch to selectively interconnect said carrier assembly member of said simple planetary gear set and said carrier assembly member of said compound planetary gear set;a first selectively engageable brake to selectively connect said carrier assembly member of said simple planetary gear set with a stationary member of said transmission;a second selectively engageable brake to selectively connect both of said sun gear members with the stationary member of said transmission;a third selectively engageable brake to selectively connect said ring gear member of said simple planetary gear set with the stationary member of said transmission; andsaid four selectively engageable clutches and three selectively engageable brakes being engageable in combination of two clutches and one brake to establish five forward speed ratios and at least one reverse speed ratio between said input shaft and said output shaft and in combination of three clutches to establish a direct forward ratio.