A 3-position 3-way solenoid valve for anti-lock brake system is disclosed having a hinge structure. The solenoid valve includes a cylindrical housing and two covers hermetically coupled to both ends of the housing.Needle & Gauge Valves The housing and two covers define an inner chamber which is partitioned into first and second chambers by a barrier, and first to third ports are communicated with the first chamber.Gate Valves The second chamber contains an armature, a solenoid assembly and a core, and the armature is fixed to a push rod which extends into the first chamber through a barrier hole. An end of the push rod in the first chamber is fitted to a ball slider within which a ball is included interposing a first spring. REDUCING VALVESA second spring interposes between the cover defining the first chamber and one end of the ball slider. A step is formed on the outer wall of the ball slider. A valve lever extends substantially parallel with the ball slider to be caught with the step. A spool is fixed to one end of the valve lever in parallel with the valve lever. The valve lever is connected to a supporting rod by a pin to rock both ends of the valve lever, and the supporting rod is fixed to the cover. A third spring is disposed between the valve lever and the cover to be coaxial with the ball slider.

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