| 摘要 |
PURPOSE:To prevent shock due to gear shifting from being increased by suspending feed-back control at the time when the next gear shifting command is directed before feed-back control for one gear shifting gas not been brought to an end yet. CONSTITUTION:An automatic transmission composed of a torque converter 20, an over-drive mechanism 40, and of an under-drive mechanism 60 consisting of third forward speed and reverse executes feed-back control in accordance with usual logic when the first gear shifting command is directed by the ECU 84. But when the second gear shifting command is directed before the aforesaid control has not been brought to an end yet, a feed-back control for both the first and second gear shifting is suspended at the time. As a result, it will never take place that a friction engagement device concerning the second gear shifting starts engaging, and the rotating condition of a member detecting revolutions comes greatly out of the locus of a normally expected target revolution, so that engaging hydraulic pressure is greatly corrected by the function of feed- back control. This constitution can thereby prevent shock due to gear shifting from being increased. |
