Vehicle, driving system, and control methods of the same

摘要

At the time of a change of a gearshift position SP from a neutral (N) position to a drive (D) position (step S 220 ), when a vehicle speed V is not lower than a preset reference speed Vref 1 (step S 230: yes), the control procedure of the invention connects a power shaft with a driveshaft and attains an actual gear change of a transmission to a first speed (step S 240 ). The reference speed Vref 1 may be set to a slightly higher vehicle speed than an upper limit of a specific vehicle speed range having a potential for over rotation of a first motor by the gear change of the transmission to the first speed. When the vehicle speed V is lower than the preset reference speed Vref 1 (step S 230: no), on the other hand, the control procedure prohibits the connection of the power shaft with the driveshaft and the actual gear change of the transmission to the first speed. This arrangement desirably prevents the over rotation of the first motor caused by the gear change of the transmission to the first speed in the state that the vehicle speed V is lower than the preset reference speed Vref1.