| 摘要 |
A vehicle suspension system 10 comprises: at least one suspension bellows 22; a source of pressurised fluid 14; a supply line 16 which extends between the suspension bellows 22 and the source of pressurised fluid 14 via a raise/lower valve 24; and a manually operable operating member 26 which is movable between a raise position, a lower position and a drive position. The operating member 26 is connected to the raise/lower valve 24 which is configured such that when the operating member 26 is moved to the raise position, the raise/lower valve 24 moves to a raise position in which the suspension bellows 22 are directly connected to the source of pressurised fluid 14. When the operating member 26 is moved to the lower position, the raiser/lower valve 24 moves to a lower position in which suspension bellows 22 are vented to a low pressure region. When the operating member 26 is moved to the drive position, the raise/lower valve 24 moves to a drive position in which the suspension bellows 22 are connected to the or a source of pressurised fluid 14 via an electrically operated suspension valve assembly 12. The raise/lower valve 24 is further provided with a fluid pressure operated actuator 28 which moves the raise/lower valve 24 to the drive position when pressurised fluid is supplied to the actuator 28, and a pilot pressure line 30 by means of which pressurised fluid is supplied to the actuator 28. |
