| 摘要 |
PROBLEM TO BE SOLVED: To make the protection of a motor compatible with the stability of traveling, by preventing the traveling from being unstable due to a change of the yaw rate behavior of a vehicle, when correcting an output of the motor to a reduction side that is estimated, such that a seizure-preventing temperature of the motor exceeded an allowable temperature range, in an electric vehicle of a wheel independently driven type, whose wheels are driven by the individual motors. SOLUTION: A controller 5 reads motor temperature, detected by using signals of temperature sensors 6FL, 6FR, 6RL and 6RR installed at the driving motors 3FL, 3FR, 3RL and 3RR, and estimates the motor temperature after the detection. When the controller estimates that the left-side motor 3FL in the vehicle width direction is out of the allowable temperature range, the controller narrows down an output of the motor 3FL, and corrects the target driving force of a wheel 2FL to decrease by an amount -α. The controller then simultaneously increase an output of the remaining motor 3RL, corrects the target driving force of a wheel 2RL to increase by an amount +α, makes the total of drive forces at the left side in the vehicle width direction same as the one before the correction, and makes the sum of the drive forces of the wheels 2FL, 2FR, 2RL and 2RR the same as the one before the correction. COPYRIGHT: (C)2005,JPO&NCIPI |
