| 摘要 |
An automatic transmission for a motor vehicle having a gear train capable of establishing five forward and one reverse drive ratios comprises: a) an input shaft (10); b) a first planetary gear set (14) concentrically mounted about the input shaft (10) for rotary movement therewith, the first planetary gear set (14) including a first sun gear (32) selectively connectable to the input shaft (10), a first annulus gear (34) and a first planetary carrier (38); c) a second planetary gear set (16) concentrically mounted about the input shaft (10) in an axially spaced relationship with respect to the first planetary gear set (14), the second planetary gear set (16) including a second sun gear (40) selectively connectable to the input shaft (10), a second annulus gear (42) rigidly coupled to the first planetary carrier (38), a second planetary carrier (46) selectively couplable to the input shaft (10) and rigidly connected to the first annulus gear (34); d) an output shaft (12) extending in a spaced, parallel relationship with respect to the input shaft (10); and e) a third planetary gear set (18) concentrically mounted about the output shaft (12) and drivingly coupled to both of the first planetary carrier (38) and the second annulus gear (42), wherein the first (14) and second planetary gear sets (16) serve to provide first to fourth forward drive ratio and one reverse drive ratio, the third planetary gear set (18) being operable to establish a fifth forward drive ratio.
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