Patent ID: 9643611
Date: 2017-05-09
CPC Classifications: B60L,B60W,Y02T

Claim:
1. A control device for a vehicle that controls: a motor generator that generates torque for driving the vehicle and executes regeneration in which kinetic energy of the vehicle is converted into electrical energy, a multi-speed transmission that transfers torque of the motor generator with a selected gear ratio from a plurality of available gear ratios toward a wheel, and a fluid pressure brake that brakes the vehicle, the control device for the vehicle comprising: a first acquiring unit that acquires a speed or speed variation of the vehicle; a second acquiring unit that acquires an operation input for accelerating or decelerating the vehicle; a comparing unit that predicts deceleration of the vehicle and compares a first value with a second value, the first value being the kinetic energy regenerated in a case where the selected gear ratio in the transmission is retained in the deceleration of the vehicle, the second value being a sum of kinetic energy lost in shifting the selected gear ratio to a lower gear ratio and kinetic energy regenerated after shifting to the lower gear ratio; and a drive control unit that controls an operation of the motor generator, shifting between the plurality of gear ratios in the multi-speed transmission, and an operation of the brake, wherein the drive control unit executes control to retain the selected gear ratio of the plurality of gear ratios in the multi-speed transmission during the deceleration of the vehicle and regeneration executed by the motor generator in a case where the first value is equal to or larger than the second value, and the drive control unit executes control to shift the selected gear ratio to the lower gear ratio in spite of the deceleration of the vehicle and the regeneration executed by the motor generator in a case where the first value is smaller than the second value.