Patent ID: 11878592
Assignee: NISSAN MOTOR CO., LTD.
Field: Transport (Mechanical engineering)
Classification: CPC B  Y | IPC B

Claim 7:
8. A control device for an electric vehicle that is provided with a motor that gives braking force or driving force to the vehicle in accordance with an accelerator operation amount, and a controller that controls the braking force when the accelerator operation amount is smaller than a given value, and controls the driving force when the accelerator operation amount is the given value or larger, wherein
the controller:
estimates disturbance torque that acts on the motor as a resistance component relating to a gradient;
executes correction by which the braking force or the driving force is increased and decreased based on an estimated value of the disturbance torque so that a speed of the vehicle is maintained regardless of a road gradient when the accelerator operation amount is constant by canceling the resistance component;
compare a partial state equivalent and the accelerator operation amount that is acquired from a driver, wherein the partial state equivalent is an accelerator position which does not generate acceleration or deceleration of the electric vehicle and causes the electric vehicle to travel at a constant speed;
determine the driver requests acceleration when the accelerator operation amount is larger than the partial state equivalent;
determine the driver requests deceleration when the accelerator operation amount is smaller than the partial state equivalent;
and, reducing an amount of the correction when determining that the driver requests acceleration on a downhill road or when determining that the driver requests deceleration on an uphill road.