| 摘要 |
PURPOSE:To improve the manipulating property in the operation by linking a pair of cylinder chambers of a sensing cylinder which has a pair of centering springs to operate the control valve of a rear steering to a front steering. CONSTITUTION:A front power steering 11 is composed by providing a front booster 20 having a pair of cylinder chambers, and a front control valve 21 to control the direction of the pressure oil to feed to or to exhaust from the booster 20. And a rear power steering 12 is composed in the same manner by providing a rear booster 34 and a rear control valve 35. The rear control valve 35 is operated by a sensing cylinder 13 which has a pair of sensing chambers 53 and 54 housing centering springs 55 and 56 respectively, and the chambers 53 and 54 are linked to the cylinder chambers of the front booster 20 through a pair of pipings 14 and 15 whose parts on the way are connected through a mode change valve 17. |
