Patent ID: 6860348

Claim:
An electric vehicle comprising: a vehicle body; left and right electric motors mounted on the vehicle body; left and right driving wheels mounted on the vehicle body and driven by the left and right electric motors, respectively; and a control section for producing a motor control signal to bring an actual number of motor rotations of each of the left and right electric motors closer to a target number of motor rotations of each of the left and right electric motors, and for performing a motor speed correction process for each of the left and right electric motors, including the steps of (a) determining whether or not three predetermined conditions have been satisfied, the three conditions comprising (1) that a straight-ahead travel instruction has been supplied to the electric vehicle for instructing the electric vehicle to travel in a straight direction at a speed corresponding to the target number of motor rotations, (2) that the actual number of motor rotations of each electric motor is less than the target number of motor rotations thereof, and (3) that the motor control signal for bringing the actual number of motor rotations closer to the target number of motor rotations has reached a predetermined upper limit output value, and (b) performing a downward motor-rotation correction process when the three predetermined conditions have been satisfied for at least one of the left and right electric motors, by progressively incrementally reducing one of the target number of motor rotations and the upper limit output value of the motor control signal until the respective actual numbers of rotations of the left and right motors substantially coincide with each other, to thereby cause the electric vehicle to travel in the straight direction.