| 摘要 |
Disclosed is a solenoid valve 10 having a valve sleeve 41 in which a spool 60 is arranged on the interior so as to move freely in axis direction, and a solenoid portion 20 which is mounted at one end along axial direction of the valve sleeve 41 and which gives a force to move the spool 60 in axial direction. A plurality of ports 51 to 54, which properly communicate with an internal flow passage 47 formed in the valve sleeve 41, is formed inside the valve sleeve 41. In at least an outlet port 51 of the plurality of ports, a relation of S1≧S0 is fulfilled, where S1 is an opening area of valve portion when the spool 60 moves in axial direction to maximally open the valve portion between the outlet port 51 and the internal flow passage 47, and S0 is the total flow passage cross-sectional area. |
