| 摘要 |
PROBLEM TO BE SOLVED: To provide a solenoid valve in which a movable iron core is prevented from pushing a valve element against a valve seat with an energy of [mass]×[speed]<SP>2</SP>/2 because of the energizing force of a return spring, when an exciting coil of the solenoid valve is demagnetized. SOLUTION: The solenoid valve has a solenoid operation part 10 for driving the valve element 37 to change over communication between ports with pressure contact with the valve seats 40, 41 arranged opposing each other. Herein, an annular cap 18 is slidably fitted to the outer periphery of the movable iron core 16. The cap is energized toward the valve element by the return spring 19, and has a stepped portion opposed to a stepped portion provided at the front end of the movable iron core. It is formed to be non-movable relative to the movable iron core in the energizing direction of the return spring with both stepped portions abutting on each other. A push rod 45a is provided on a holding member 45 of the valve element energized by a valve spring 49, and opposed at its front end to the front end face of the cap. The valve element is driven to change over it by the energizing force of the return spring, independently of the movable iron core. COPYRIGHT: (C)2008,JPO&INPIT
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