| 摘要 |
<P>PROBLEM TO BE SOLVED: To shorten acceleration time when a vehicle is accelerating and a braking distance when the vehicle is decelerating, and to suppress vibration of an electric drive vehicle. <P>SOLUTION: The electric drive vehicle includes: drive wheels 3, 6; driven wheels 7, 8; electric motors 1, 4 for driving or braking the drive wheels; and an electric motor controller 33 for controlling the electric motors. This vehicle also includes: wheel speed detectors 9 to 12 for detecting the wheel speed of the drive wheels and the driven wheels; a computing means for computing the slip ratio of the drive wheels on the basis of the wheel speed of the drive wheels and the driven wheels; and a determiner for determining that the drive wheels are slipping when the slip ratio exceeds a slip ratio determination value. At the determiner, when the wheel speed of the driven wheels is lower than the set speed, a slip ratio determination value is changed to a value having the same sign as, and a greater absolute value than the value used when the wheel speed of the driven wheels is greater than the set speed. <P>COPYRIGHT: (C)2012,JPO&INPIT |
