| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the generation of noise by hydraulic fluid flowing through an orifice consisting of the core of a hydraulic fluid control valve for a power steering device, and the land and the groove of a sleeve. SOLUTION: A hydraulic fluid control valve comprises valve members 60 and 62 mutually rotatable around an axis 23. A hydraulic fluid flow orifice 110 comprises the valve members 60 and 62. The orifices 110 are situated centering around the axis 23 and arranged at a peripheral distant from each other. The orifices 110 are varied in size, the valve members are relatively rotated from a neutral position, and when a pair of adjacent orifices 110b and 110c effect limitation, the orifice 110a is enlarged. The orifices 110b and 110c, making a pair, effect limitation at a different speed at an initial stage and thereafter, limitation is effected at an equal speed until the orifices reach a complete limitation state.</p> |
