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14:50 ics Saal 4
The Liebherr Intelligent Hydraulic Cylinder as building block for innovative hydraulic concepts
Paolo Leutenegger, Liebherr-Elektronik GmbH, Germany
We present hereafter the development of the Liebherr Intelligent Hydraulic Cylinder, in
which the hydraulic component is used as smart sensing element providing useful
information for the system in which the cylinder is operated. The piston position and
velocity are the most important signals derived from this new measuring approach. The
performance under various load and temperature conditions (measured both on
dedicated test facilities and in field in a real machine) will be presented. An integrated
control electronics, which is performing the cylinder state processing, additionally
allows the synchronized acquisition of external sensors. Providing comprehensive state
information, such as temperature and system pressure, advanced control techniques or
monitoring functions can be realized with a monolithic device. Further developments,
trends and benefits for the system architecture will be briefly analyzed and discussed.