Method and apparatus for controlling fluid pressure
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United States of America Patent
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-
Jun 19, 2001
Grant Date -
N/A
app pub date -
Sep 15, 1998
filing date -
Sep 16, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In controlling the fluid pressure applied to a load using a proportional fluid pressure control valve or a flow control valve, responsiveness of control is improved in a pressure region where the consumption of fluid is larger than in other regions. In this method, if there is a pressure region where the consumption of fluid is greater than in other regions, overshoot control is carried out to increase fluid pressure in such a pressure region by adding a predetermined pressure to a target pressure for a predetermined time, or undershoot control is carried out to reduce fluid pressure in such a pressure region by subtracting a predetermined pressure from a target pressure for a predetermined time. It is thus possible to increase and reduce fluid pressure quickly to a target pressure even in a pressure region where the consumption of fluid is large.
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