| 摘要 |
<p>The present invention relates to a control valve that supplies a hydraulic pressure to a wheel cylinder in an anti-lock brake system modulator. In the present invention, a rotary spool (25) is connected to a step or direct-current (DC) motor (21)'s shaft and rotates in a cylinder (22). Through holes (27, 28, 29), hexagonally divided when viewed from the plane, are provided to the spool. The through holes (27, 28) are on the same horizontal line, and races (30, 30-1) are provided to at both ends of one of the through holes (27, 28). Another hole (29) is on the different horizontal line. In the cylinder (22) elbows (37, 38) are provided to the holes (27, 28)'s same horizontal line and hole (29)'s, respectively with deviation of 120 degrees therebetween. The gearshift can be exactly and rapidly performed just by rotating the rotary spool of this invention. Therefore, this invention can lower the production costs and assures trouble-free operation.</p> |
