| 摘要 |
PROBLEM TO BE SOLVED: To provide a control relay having a supply pressure fluctuation compensation function even at a low gain by forming a bias chamber and an output pressure chamber outside without forming them between a valve plug and an input diaphragm, and further, by providing two gain switching chambers. SOLUTION: The pressure booster is so composed that it receives the supply fluid pressure and the input fluid pressure, it changes the output fluid pressure corresponding to the changes of the input fluid pressure, and it increases the pressure of the fluid. It is provided with a supply pressure chamber to receive the supply fluid pressure, the bias chamber to receive the supply fluid pressure, an input pressure chamber to receive the input fluid pressure, a feed-back chamber to receive the output fluid pressure, a moving body to be moved by the elastic deformation of the diaphragm, the output pressure chamber in which the output fluid pressure is changed when the input fluid pressure is changed, and the valve plug to open/close a flow passage connecting the supply pressure chamber and the output pressure chamber. Two first/second gain switching chambers for switching the gain are provided between the feed-back chamber and the output pressure chamber. COPYRIGHT: (C)2004,JPO&NCIPI
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