| 摘要 |
A pump rotation speed correcting unit includes a valve opening degree command differential value computing unit, a pump rotation speed correction value computing unit, and a correction value adding unit. The valve opening degree command differential value computing unit computes a temporal differential value of a valve opening degree command value that is set by a valve opening degree command value setting unit. The pump rotation speed correction value computing unit computes a correction value of a pump rotation speed command value on the basis of the valve opening degree command differential value. The correction value adding unit adds the pump rotation speed correction value to the pump rotation speed command value that is set by the pump rotation speed command value setting unit.
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