| 摘要 |
A seven-speed powertrain of an automatic transmission includes an input shaft; an output shaft disposed in-parallel with the input shaft; a primary shift portion including a compound planetary gear set having four operational elements and a first simple planetary gear set having three operational elements; a secondary shift portion including a second simple planetary gear set having three operational elements; and a transfer gear device. The operational elements of the primary shift portion are combined by three clutches, two brakes, and one one-way clutch. The operational elements of the secondary shift portion are combined by one clutch, one brake, and one one-way clutch.
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