PURPOSE: To improve a brake feeling ever so better as well as to simplify a brake structure, by making each of constituent parts of a control valve, which actuates simultaneously with selection of a directional selector valve in time of skid controlling and intercepts a master cylinder from the selector valve as well as to feed a wheel cylinder with hydraulic pressure of a pump, turn to those being made of a magnetic material in structure.
CONSTITUTION: A control valve 70 consists of a solenoid on-off valve 14 interconnecting and intercepting a directional selector valve 18 to and from a master cylinder and an on-off valve 46 feeding the directional selector valve 18 with a discharged fluid out of a pump. Both housings of the control valve 70 and the selector valve 18 are formed by a solid housing 72. And, a piston 48 and a tappet 130 opening the on-off valve 46 is manufactured with a magnetic material. In time of skid controlling, the selector valve 18 is selected to a closing position of the wheel cylinder or to an interconnecting position to the reservoir by a microcomputer, while the on-off valve 14 closes as the tappet 130 is accurately seated on a valve seat 128 by excitation of a solenoid 64. Therefore, in time of pressure application, the piston 48 operates by hydraulic pressure of the master cylinder, opening the on-off valve 46 and feeding the wheel cylinder with the discharged fluid of the pump.
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OKA HIROYUKI
OOTSUKI HIROMI
NIPPON DENSO CO