| 摘要 |
PURPOSE:To improve speed change quality and stabilize the speed change quality at the time of low load, so as to secure, on high levels, improvement in the speed change quantity and stabilization of the speed change quality regardless of individual difference aged deterioration in a speed change controller of an automatic transmission for controlling speed change oil pressure to a fastening element at the time of speed change. CONSTITUTION:A speed change control means (g) for making speed change oil pressure control while varying a ramp coefficient which shows the inclination of increase in fastening oil pressure at the time of speed change. Additionally, a ramp coefficient learning corrective means (i) for correcting the set ramp coefficient based on detection of a specified corrective factor is provided. |
