The present invention relates to a method for attenuating the motion of
hydraulic cylinders of mobile work machinery, in particular of hydraulic
excavators, in which prior to the hydraulic cylinder reaching one of the
limits of travel, its motion speed is reduced, and the hydraulic cylinder
is moved to the respective limit of travel at reduced speed; wherein for
the purpose of reducing the speed, the inflow to, and/or the outflow
from, the hydraulic cylinder are/is throttled by a flow control device.
According to the invention, the method is characterized by, prior to the
respective limit of travel being reached, the motion speed of the
hydraulic cylinder is registered, and the point in time when throttling
commences is changed depending on the registered motion speed.
Furthermore, the present invention relates to a device for attenuating
the motion of hydraulic cylinders of mobile work machinery, in particular
of hydraulic excavators, a position registering device for registering a
preliminary limit position of the hydraulic cylinder, a control device
for throttling the inflow and/or outflow of the hydraulic cylinder, and a
control device for controlling the flow control device when the
preliminary limit position is reached. According the invention, the
device has a speed registering device for registering the motion speed of
the hydraulic cylinder when the preliminary limit position is reached,
and the control device has a delay device for delaying driving the flow
control device, depending on the recorded motion speed.