Transmission control method and apparatus for a vehicle

Method and an apparatus for controlling a vehicle comprising a power train control unit 100 that controls friction clutch 203 when shifting from one cogwheel row to the other cogwheel row, sets the target synchronous rotation speed (Ni_ref) based on the output rotation speed (No) of a transmission and parameters indicative of the state of engine 1 or the transmission, and sets the command value to the friction clutch so that the input rotation speed (Ni) can be synchronized with the target synchronous rotation speed (Ni_ref). Control unit 100 sets the target shifting required time (TTm_sfn) based on parameters indicative of the state of engine 1 or the transmission, and corrects the command value to the friction clutch so that the required shift time (Tm_sfn) can approach the above target shift required time (TTm_sfn).