HYDRAULIC CYLINDER CONTROLLER OF CONSTRUCTION MACHINE

摘要

PROBLEM TO BE SOLVED: To provide the reliable shock absorbing effect by making a sufficient shock absorbing function act even in large load. SOLUTION: Load W is detected by a load sensor 11, the discharge side flow rate is decreased by throttling the opening of a variable throttle valve 23 by a controller 24 when the load W is large and a cylinder which acts to the acceleration side is extended, the cylinder operation is decelerated, and the shock absorbing action by a shock absorbing throttle 8 is made to effectively act.