| 摘要 |
A solenoid valve for an anti-lock brake system is disclosed which has two orifices and oil passages formed a magnetic core so that at the slip mode the amount of hydraulic oil transmitted to a wheel sylinder can be varied, its structure is simplified and its manufacture is facilitated. The solenoid valve includes a magnetic core 130 inserted into a bore 101 in a modulator 100 which has an inlet and outlet passages 300 and 310 and an invariable orifice 320, a plunger 140 installed in the magnetic core 130, and a piston 200A installed in the inlet passage 300. The piston 200A has an eccentric hole 202 formed vertically passing through its interior and a groove 203 on its top surface, thus forming a variable orifice 340 along with a lower end of the invariable orifice 320. The magnetic core 130 has a through hole 330 formed slanting upward. A lip seal 400 is formed between the outer periphery of the magnetic core 130 and the bore 101.
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