Shock prevention apparatus for hydraulic/air-pressure equipment and method thereof
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United States of America Patent
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Apr 23, 1996
Grant Date -
N/A
app pub date -
Oct 20, 1994
filing date -
Mar 31, 1994
priority date (Note) -
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Abstract
Disclosed is a shock prevention apparatus and method for hydraulic construction equipment such as excavators, loaders, dozers and cranes, which use hydraulic cylinders and motors as actuators. The shock prevention apparatus of the present invention low pass filters an original actuator driving command signal of the rectangular wave in accordance with displacement data of the piston stroke in the actuator, to generate a smooth actuator driving command signal, so that the shocks due to rapid opening and closing of the oil passages of the hydraulic actuator and the shocks at the stroke ends of the piston of the hydraulic actuator are prevented.
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