Patent ID: 8078348

Claim:
An electric vehicle comprising: an electric motor, which is capable of selectively outputting a drive torque and a regenerative torque, as a traveling motive power source; a basic target torque determining means which determines, on the basis of an operational state of an accelerator pedal, a basic target torque which is a basic target torque of the electric motor and which becomes a regenerative torque in the case where the operational state of the accelerator pedal of the vehicle is an OFF state; a gradient grasping means which grasps the gradient of a road surface on which the vehicle is traveling; a target acceleration determining means which determines, on the basis of the gradient of the road surface grasped by the gradient grasping means, a target acceleration which is a target acceleration of the vehicle in the case where the operational state of a brake pedal of the vehicle and the operational state of the accelerator pedal thereof are the OFF state when the vehicle is traveling on a down-slope road and which is a target acceleration for restraining an increase in the speed of the vehicle more than an acceleration generated in the vehicle in the case where it is assumed that the operational state of the brake pedal of the vehicle and the operational state of the accelerator pedal thereof are the OFF state and that the vehicle is traveling on the down-slope road in a state wherein the electric motor is generating an output torque of the basic target torque; an actual acceleration grasping means which grasps an actual acceleration, which is a real acceleration of the vehicle; a down-slope road regeneration correction amount determining means which determines, on the basis of the actual acceleration and the target acceleration, a down-slope road regeneration correction amount, which is a correction amount of a regenerative torque of the electric motor for bringing the actual acceleration close to the target acceleration when the vehicle is traveling on the down-slope road; a target torque determining means which determines a target torque of the electric motor by correcting the basic target torque on the basis of at least the down-slope road regeneration correction amount; and a motor controlling means which controls the energization of the electric motor such that the electric motor generates an output torque of the target torque.