| 摘要 |
<p>PURPOSE:To prevent the occurrence of a change in a speed of an actuator, by a method wherein, when a hydraulic pump, connected to the actuator, is replaced with another hydraulic pump, a discharge amount of each pump and an opening and closing valve are controlled simultaneously. CONSTITUTION:When a signal, which switches a hydraulic pump, connected to a cylinder 21, from a hydraulic pump 10 to a pump 12, is inputted, an instruction on reduction of the discharge amount of the hydraulic pump 10, an instruction on increase of the discharge amount of the hydraulic pump 12, and an instruction to bring an opening and closing valve 52a into a closing a valve 52b to an opening are issued simultaneously. A rate of a change in the discharge amount of the hydraulic pump 10 in the same as that of the hydraulic pump 12, and thereby no change in an inlet amount of a cylinder 21 is produced, which results in applying no shock to a machine body even if the rate of the change in the discharge amount of the hydraulic pumps 10 and 12 is accelerated.</p> |
