Method of controlling an apparatus for easing impact on a boom of an excavator

摘要

An apparatus for easing an impact on a boom of an excavator and a method of controlling the same are disclosed. The apparatus includes first (1) and second (2) hydraulic pumps; a boom cylinder (3); a main control valve (4); an operation lever (5) for supplying pilot signal pressure to a spool of the main control valve (4) when an operator manipulates the operation lever (5); operation lever detection means (6,7) for detecting boom up and boom down signal pressures according to an amount of manipulation of the operation lever; boom cylinder pressure detection means (8,9) for detecting pressures generated in a large chamber (3a) and a small chamber (3b) of the boom cylinder (3); a controller (10) for calculating and outputting a control signal of the main control valve (4) if the boom cylinder has been suddenly stopped; and boom vibration preventing means (11,12) for controlling the pilot signal pressure being supplied from the second hydraulic pump (2) to the main control valve.