| 摘要 |
A planetary gear transmission mechanism for an automotive vehicle comprising two simple planetary gear units located in a first transmission housing portion, together with clutch and brake means for establishing three forward driving torque delivery paths with uniformly stepped ratios and a single reverse drive torque delivery path, a third simple planetary gear unit situated in a second transmission housing portion on the torque input side of the pair of gear units whereby each forward driving speed ratio established by the pair of gear units, as well as the reverse drive ratio, may be modified, and clutch and brake means in the second housing portion for controlling the motion of the elements of the third gear unit.
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