Patent ID: 8006790

Claim:
A vehicle that is driven with powers respectively output to front wheels and rear wheels, the vehicle comprising: a first shaft that is linked with the front wheels; a second shaft that is linked with the rear wheels; an internal combustion engine that outputs power to a preset driveshaft; a power distribution transfer structure that transfers power output to the driveshaft in a distributive manner to the first shaft and to the second shaft at a front-rear distribution ratio that is a constant value; a motor that outputs at least a regenerative braking force to the driveshaft; an accumulator unit that transmits electric power to and from the motor; a speed change transmission structure that enables transmission of power between a rotating shaft of the motor and the driveshaft with a change of a speed change ratio; a braking mechanism that enables independent application of a braking force to the front wheels and to the rear wheels; a braking force demand setting module that sets a braking force demand required by a driver's braking request operation; a braking fraction setting module that sets a fraction of the regenerative braking force by the motor and a fraction of the braking force by the braking mechanism relative to the set braking force demand according to a setting of the speed change ratio in the speed change transmission structure, in response to the driver's braking request operation, the braking fraction setting module gradually decreasing the fraction of the regenerative braking force relative to the set braking force demand before a start of the change of the speed change ratio in the speed change transmission structure, the braking fraction setting module setting the fraction of the regenerative braking force relative to the set braking force demand to zero during the change of the speed change ratio in the speed change transmission structure, and the braking fraction setting module gradually increasing the fraction of the regenerative braking force relative to the set braking force demand after the change of the speed change ratio in the speed change transmission structure; and a braking controller that controls the motor to output the regenerative braking force based on the set braking force demand and the set fraction of the regenerative braking force, while controlling the braking mechanism to enable the braking force based on the set braking force demand and the regenerative braking force by the motor to be applied in a distributive manner at the constant front-rear distribution ratio to the front wheels and to the rear wheels.