| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress the overshoot of a current by integrating operation when the target current of a solenoid changes stepwise. <P>SOLUTION: When the current is started to flow to the solenoid operating a differential lock, the current to the solenoid is controlled by feedback by using a current limit value as a target. When the transfer of the differential lock to a locked state is detected, the target current is lowered to a minimum holding current and controlled by feedback. In the feedback control, when the change rate of the solenoid current exceeds a prescribed rate A, the integrated value Sigma of a current deviation is reset to 0 to avoid that the integrated value Sigma is excessively increased. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
