Patent ID: 7282011

Claim:
A control apparatus for controlling a stepped automatic transmission of a vehicle having an output shaft and an input shaft which is to be mechanically connected to an engine of the vehicle while a shifting action is being effected in the transmission, comprising: a torque vibration restrainer operable, upon completion of the shifting action in the transmission, to restrain a torque vibration which is generated in a power transmitting path of the vehicle; and a shifting-action completion determiner operable to determine whether the shifting action has been completed or not, depending upon whether a rotational speed of the input shaft has been substantially equalized to a product of a rotational speed of the output shaft and a newly established speed ratio of the transmission which is established as a result of the shifting action. wherein said shifting-action completion determiner determines that the shifting action has been completed when the rotational speed of the input shaft has been substantially equalized to the product of the rotational speed of the output shaft and the newly established speed ratio of the transmission. and wherein said torque vibration restrainer is initiated to be operated, upon determination by said shifting-action completion determiner that the shifting action has been completed, to restrain the torque vibration.