| 摘要 |
<p>PURPOSE:To reduce passage pressure loss and perform accurately pressure and flow rate control during the transition period by providing poppet type cartridge valves responsive to pilot pressure and a four-way valve on the inflow and outflow sides of an actuator. CONSTITUTION:Poppet type cartridge valves 24A, 24B responsive to a pilot pressure and a four-way valve for supplying oil pressure selectively to the cartridge valves are interposed on the inflow and outflow sides of an actuator 20 and the cartridge valve 24A, 24B and the four-way valve 25 are connected to a controller 27. In this manner, the circuit constitution becomes simple, so that the passage pressure loss may be reduced. The pressure and flow rate control under the transition condition can be performed accurately.</p> |
