| 摘要 |
PURPOSE:To prevent the occurrence of a gear-change shock by providing a one-way clutch on each of connecting passages between an input shaft and the sun gear of a double pinion type planetary gear train, between the sun gear and a case, between the carrier of a single pinion type planetary gear train and the case, and between its sun gear and the case. CONSTITUTION:The gear change between the first gear stage and the second gear stage can be attained merely by the release of a second clutch C2 and the engagement of a third clutch C3. The gear change between the second gear stage and the third gear stage can be carried out merely by the engagement or release of a second brake B2. The gear change between the third gear stage and the fourth gear stage can be carried out merely by the engagement or release of a first clutch C1. And, the gear change between the fourth gear stage and the fifth gear stage can be carried out merely by the engagement or release of a brake B3. Thus, since most of the gear changes can be attained merely by means of the engagement or release of only one frictional engaging element, it is prevented that engine speed is increased, that a large load is generated, or that a gear ratio in the opposite direction to the corresponding gear change is attained resulting from the engagement between plural frictional engaging elements or the shift in the timing of the engagement.
|
