Control system and control method for a hydraulic working machine

摘要

The present invention relates to a control system and method for a hydraulic working machine (1) characterized by having a construction wherein a flow discharge control valve (11) is disposed in a discharge-side pipe line (15a) of a main flow control valve (7), the amount of operation of an operating lever (8a) is converted to a pilot pressure by a remote controlled valve (8), the pilot pressure is then input to a controller (13) and is calculated into a pressure change speed as operation speed, in a pressure change speed calculator (13a), further, the operation speed is calculated into an electromagnetic valve current in an electromagnetic valve current calculator (13b), then the electromagnetic proportional valve current is output to an electromagnetic proportional valve (12) from a command unit (13c), and the degree of opening of the discharge flow control valve (11) is controlled with a secondary pressure in the electromagnetic proportional valve (12). According to this construction, it is possible to diminish impact and vibration which occur when there is performed a sudden operation, and also possible to improve the operability for braking and stopping an actuator (5). <IMAGE>