| 摘要 |
<P>PROBLEM TO BE SOLVED: To avoid repeated forward and backward movement of a vehicle by preventing repeated torque limit control in locking a motor installed as a power source of the vehicle. <P>SOLUTION: When a motor rotational speed Nm is within a lock determination rotational range, it is previously predicted whether or not there is possibility that the motor may be locked depending on whether an accelerator opening Acc is smaller than a lock prediction determination opening. When it is predicted that the motor may be locked, a variation ΔTm (upward gradient) per calculation period (per unit time) of the motor command torque Tm is decreased more as a deviation of a lock determination torque Tmlck from the motor command torque Tm becomes smaller in increasing a motor command torque Tm, thereby controlling the motor command torque Tm so as to be maintained at the lock determination torque Tmlck or lower as much as possible. Thus, the determination frequency of motor locking is reduced to reduce the frequency of torque limit control in locking. <P>COPYRIGHT: (C)2010,JPO&INPIT |
