| 摘要 |
PURPOSE: A hydraulic pressure control device of a brake is provided to reduce the size and manufacturing cost by simplifying the structure, and to press oil in a return passage through gradual liquid compression by reducing pulsation of pressure with arranging hydraulic pumps including piston type armatures. CONSTITUTION: A hydraulic pressure control device of a brake is composed of a return passage(25) formed in a modulator block for circulating oil, and hydraulic pumps(30,50) sucking, pressing and discharging oil from the return passage. The hydraulic pumps have bores(31,51) formed in the modulator block and communicated with the return passage through a through hole, piston type armatures(32,52) moving back and forth in bores, magnetic cores(33,53) spaced from the ends of the armatures, exciting coils(36,56) mounted outside the magnetic cores and the armatures to move back and forth the armatures, return springs(37,57) returning the armatures in not applying power to the exciting coils, and first and second check valves(39,40,59,60) installed in the upper and lower parts of the return passage to press and discharge oil unidirectionally in moving the armatures back and forth.
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