Nissan Motor Company Limited

Yui Ito

Akira Sawada

Hiroyuki Komatsu

Jun Motosugi

Takashi Nakajima

Kengo Fujiwara

Shou Oono

A method for controlling an electric vehicle including a plurality of driving wheels and a plurality of electric motors that generate driving forces respectively for the plurality of driving wheels, the method including: estimating a vehicle body speed for each of the driving wheels based on a rotation speed of each of the electric motors; estimating, for each of the driving wheels, a driving wheel disturbance torque, which is a disturbance torque acting on the driving wheel, based on the vehicle body speed estimated for each of the driving wheels; estimating a vehicle disturbance torque, which is an actual disturbance torque acting on the entire electric vehicle, based on the driving wheel disturbance torque estimated for each of the driving wheels; and controlling a torque to be output by each of the plurality of electric motors based on the vehicle disturbance torque.

Method for controlling electric vehicle and device for controlling electric vehicle

An electric vehicle control method for controlling a motor based on a torque command value in an electric vehicle includes: a disturbance torque estimation process of calculating a disturbance torque estimation value including an influence of a road surface gradient; a speed parameter acquisition process of acquiring a speed parameter relating to a vehicle speed; and a vehicle state control including a stop process of calculating a stopping basis torque target value so as to converge the torque command value to the disturbance torque estimation value in accordance with a decrease in the speed parameter, and a vibration damping process of calculating a stopping correction torque target value by performing filtering on the stopping basis torque target value.

Electric vehicle control method and electric vehicle control device

A control method for an electric vehicle in which a motor is used as a traveling drive source and deceleration is performed by a regenerative braking force of the motor, the electric vehicle including a towing unit configured to tow a separate object, the method including: acquiring an accelerator operation amount; acquiring a total mass of the electric vehicle; estimating a disturbance torque acting on the electric vehicle; acquiring an angular velocity of a rotary body; estimating a vehicle body speed of the electric vehicle; calculating a torque command value for the motor; measuring a load applied to the towing unit; correcting the total mass of the electric vehicle based on the measured load applied to the towing unit and the torque command value; controlling a torque generated in the motor based on the torque command value; and converging the torque command value to the disturbance torque.

Control device for electric vehicle and control method for electric vehicle

Provided is an electric vehicle control method. The electric vehicle control method includes: a disturbance torque estimation process of calculating a disturbance torque estimation value including an influence of a road surface gradient; a speed parameter acquisition process of acquiring a speed parameter relating to a vehicle speed; a stop process of calculating a stopping basis torque target value so as to converge a torque command value to the disturbance torque estimation value in accordance with a decrease of a speed parameter; and a vibration damping process of calculating a stopping correction torque target value by performing filterring on the stopping basis torque target value. In the vibration damping process, the torque command value is set based on the stopping basis torque target value in a first just-before-stop period set in a relatively high vehicle speed range, and is set based on the stopping correction torque target value in a second just-before-stop period set in a relatively low vehicle speed range.

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Kanagawa, Japan

Yui Ito