| 摘要 |
PROBLEM TO BE SOLVED: To simplify a valve mechanism for deactivating a pressure compensation function when a movable body of an electromagnetic air bypass valve is opened.SOLUTION: An electromagnetic air bypass valve 20 includes: a movable body 65 having a valve member 44; a coil spring 38 for energizing the movable body 65 in a closing direction; an electromagnetic device 24 for moving the movable body 65 in an opening direction by electromagnetic power; a diaphragm 42 arranged between a fixed side member 67 of the electromagnetic device 24 and the movable body 65 to form a pressure balance chamber 52; and a pressure introduction passage 58 for communicating an inner space 45 of the valve body 44 with the pressure balance chamber 52. A valve mechanism 70 for deactivating a pressure compensation function by reducing a passage cross-sectional area of the pressure introduction passage 58 when the movable body 65 is opened is configured by a guide shaft 34 integrally attached to the fixed side member 67 of the electromagnetic device 24 and capable of varying the passage cross-sectional area of the pressure introduction passage 58 by utilizing relative movement of the movable body 65. |
