| 摘要 |
<p>It is the object of the invention to provide a winding control method in a seat belt retractor capable of preventing a motor from being stopped before reaching a predetermined load due to effects of accelerating current of the motor. In a state that the full amount of seat belt is wound or the like, the load on the motor grows. Since the current of the motor exceeds a threshold value at a point "A" where the current of the motor is rapidly increased, it is designed to make the voltage applied to the motor to zero at the point A. Since accelerating current flows into the motor when the motor is accelerated just after a voltage is applied to the motor, the value of detected current at a point B exceeds the threshold value. However, the determination of whether or not the current of the motor exceeds the threshold value is halted from when a command to wind up is outputted to when a time period T which is predetermined by previous measurement elapses. Therefore, the determination of whether or not the current of the motor exceeds the threshold value is not made at the point B where the current of the motor exceeds the threshold value due to effects of the accelerating current, thereby preventing the motor from being stopped. <IMAGE></p> |
