MULTI-SPEED TRANSMISSION

摘要

A multi-speed transmission (100) employs an efficient number of components to provide at least nine forward gear ratios and at least two reverse gear ratios between an input member (16) and an output member (20) disposed in a housing (14). The transmission may employ four planetary gear sets (30, 32, 34, 36). Each planetary gear set may include a sun gear (38/44/50/56), a planet carrier (40/46/52/58), and a ring gear (42/48/54/60). Six control elements (62/64/66/68/70/72) may be operably coupled to the planetary gear sets and selectively engageable to create the forward and reverse gear ratios.