| 摘要 |
A hydraulic pressure characteristic value setting method for an automatic transmission comprises processes; disengaging one of friction engaging elements, transmitting turbine rotation to one side of each of the friction engaging elements, securing the other side of each of the friction engaging elements, detecting variations of speed of the turbine rotation by means of a turbine rotation sensor, executing a learning of a hydraulic pressure characteristic value in accordance with at least variations in the speed of turbine rotations when a friction engaging element starts to be engaged, and disengaging the engaged friction engaging element when a predetermined guard condition has been fulfilled. |
