| 摘要 |
PURPOSE:To freely change discharge volume control characteristics by controlling a tilt angle regulator of a hydraulic pump on the basis of the respective signals obtained through arithmetically processing the pilot pressure for a pilot valve and discharge pressure of a hydraulic pump detected electrically. CONSTITUTION:Delivery pressure of an oil pump 1 is detected by a pressure sensor 7, and a rotation angle of operating levers 21 of pilot valves 22 to 25 are detected by potentiometers 26 and 27 electrically respectively, and are input to a control unit 50. This control unit 50 outputs a signal for controlling an electric actuator of a tilt angle regulator 8 according to a discharge volume control parameter added a necessary weighting characteristics to the signals fed from the potentiometers 26 and 27, and the discharge characteristics corresponding to the signal fed from the pressure sensor 7. Consequently, it is possible to freely change discharge volume control characteristics, and to improve metering characteristics. |
