| 摘要 |
<p>The present invention relates to a steering control system by pilot pressure, in which responsiveness is good, controlling force is light and a control input of a control lever is always constant independent of the wear of a brake and a clutch. For this purpose, the control lever (1) during right and left steering is directly coupled to a pilot pressure control valve (2), and the pilot pressure valve (2) is connected to a clutch piston (4) for on-off operating a clutch (3) and a brake cylinder (6) for on-off operating a brake (5) through pipings (10, 17), respectively. When the control lever (1) is operated to the right or left, the pilot pressure control valve (2) is actuated on the side of being op-erated, whereby the clutch (3) is disconnected, and subsequently, the brake (5) is applied. <IMAGE></p> |
