CONTROLLER FOR WORKING MACHINE

摘要

PROBLEM TO BE SOLVED: To provide a controller for a regenerative circuit of a working machine having a simple hydraulic circuit of the whole controller including the regenerative circuit. SOLUTION: A control valve 100 for contracting a boom cylinder 93 is controlled by pilot pressure Pdn generated by operating an operation lever 102 and the secondary pressure Pe of a solenoid valve capable of outputting pressing pressure independently from the pilot pressure Pdn. This control valve 100 controls the amount of the regeneration of return oil when the boom cylinder 93 contracts in addition to the switching of the extension and contraction of the boom cylinder 93. COPYRIGHT: (C)2008,JPO&INPIT