Multiple gear stage automatic transmission

Details Multiple gear stage automatic transmission Multiple gear stage automatic transmission

2006-11-21

2006-11-21

Bonck, Rodney H. (Department: 3681)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

C475S275000, C475S282000, C475S283000, C475S286000, C475S287000, C475S290000, C475S291000

Reexamination Certificate

active

07137923

ABSTRACT:
A multiple gear transmission having a drive shaft (1) and a driven shaft (2), three planetary gear sets (P1, P2, P3), seven rotatable shafts (1, 2, 3, 4, 5, 6, 7) and seven shifting elements (03, 04, 05, 06, 14, 37, 57) comprising four brakes (03, 04, 05, 06) and three clutches (14, 37, 57). Selective engagement of the seven shifting elements (03, 04, 05, 06, 14, 37, 57) produce, from the drive supplied by the drive shaft (1) via the three planetary gear sets (P1, P2, P3), the seven rotatable shafts (1, 2, 3, 4, 5, 6, 7) and the driven shaft (2), different reduction ratios for seven or eight forward gears and one reverse gear.

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