Apparatus and a method for controlling an automatic transmission

摘要

In a constitution that a transmission torque capacities of friction engagement elements are determined based on an input shaft torque of a speed change mechanism and a torque sharing ratio, a change velocity of the torque sharing ratio of when the transmission torque capacity of a release side friction engagement element is changed from a value greater than a critical transmission torque capacity to a value smaller than the critical transmission torque capacity, is abruptly altered when the input shaft torque is equal to or less than a predetermined value.