Patent ID: 8191364
Filing Date: 2012-06-05
Classification: E02F

Abstract:
1. A method for controlling a pump in a hydraulic circuit in which a regeneration circuit is added to a hydraulic circuit provided with a hydraulic pressure signal line for detecting a hydraulic pressure value of a circuit and controlling a volume of hydraulic fluid to a cylinder with reference to the detected value; said method comprising the steps of: in the middle of said hydraulic pressure signal line, disposing a pressure reducing and outputting means for reducing a hydraulic pressure value of said detected value to output the reduced hydraulic pressure value to a pump as an operating signal; and outputting the reduced hydraulic pressure value from said pressure reducing and outputting means by a controlling means to reduce a discharge rate from the pump, when said regeneration circuit is in a regeneration state, in which said pressure reducing and outputting means comprises a pressure reducing valve for reducing said detected hydraulic pressure value by the use of an orifice and outputting the hydraulic pressure value to a pump, upon receiving a pressure reducing command signal from a controller as said controlling means.