| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device of a variable displacement pump capable of statically stabilizing a pressure of a hydraulic oil from the variable- displacement pump for a short time. SOLUTION: A control device for controlling a pressure of a hydraulic oil from a variable displacement pump by an electromagnetic relief valve is provided with a pressure detecting means for detecting the pressure of the hydraulic oil; a target pressure setting means 25 for setting a target pressure of the hydraulic oil; a reduction circuit for demanding a deviation of a signal of a detected pressure from the pressure detecting means and the target pressure of the target pressure setting means 25; and a compensation circuit 29 for controlling the electromagnetic relief valve such that the deviation becomes zero. The compensation circuit 29 has an integration compensation circuit 61 for integration- processing an output signal from the reduction circuit 34 and a switch means 132. The switch means 132 feeds the output signal to the integration compensation circuit 61 after a predetermined time passes after the output signal from the reduction circuit 34 is within a predetermined range. |
