Velocity control for hydraulic control system
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United States of America Patent
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Aug 29, 2017
Issued Date -
N/A
app pub date -
Apr 18, 2012
filing date -
Dec 1, 2004
priority date (Note) -
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Abstract
A hydraulic drive system for an actuator uses a pair of pressure compensated hydraulic machines to control flow to and from the drive chambers of the actuator. The capacity of one of the machines is limited in a motoring mode to determine a maximum rate of efflux from one of the chambers. The pressure of fluid supplied to the other of said chambers is maintained at a predetermined level to provide motive force. The machines are mechanically coupled to permit energy recovery and charge an accumulator to store surplus energy.
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