| 摘要 |
PROBLEM TO BE SOLVED: To provide an automobile transmission device having reduced size and weight and capable of shifting up of driving power for a rear wheel side without requiring an external hydraulic pressure source. SOLUTION: A planetary gear set 12 inputs rotational power to a sun gear 18 and outputs the rotational power from a carrier case 24 for planetary gears 20-1, 20-3. For the external teeth of a ring gear 22, an one-way clutch gear 25 is provided for allowing rotation only in one direction. The sun gear 18 and the planetary gears 20-1, 20-3 or the planetary gears 20-1, 20-3 and the ring gear 22 of the planetary gear set 12 constitute gear oil pumps at a plurality of positions. A valve mechanism opens/closes a control oil path between a discharge passage for the gear oil pumps and a drain oil path. It gives no load to the gear oil pumps during full open to select shift down at a reduction ratio based on the fixation of the ring gear and seals the gear oil pumps with oil during full close to select shift up at an equal input/output speed with the sun gear, the planetary gears and the ring gear integrated. COPYRIGHT: (C)2008,JPO&INPIT
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