| 摘要 |
PURPOSE:To prevent a locking phenomenon reliably, by a method wherein starting pressure for a pressure reducing action of a pressure reducing valve is controlled according to pressure of an air spring and when the air spring is out of order, the pressure of the air spring is enclosed, through the enclosed pressure of which the pressure reducing valve is controlled. CONSTITUTION:A balancing lever 18 is built between end parts of two valve levers 9a of each of pressure reducing valves 51, 52. A protrusion 19a of a piston 19 is abutted against the balancing lever 18 and a right end face of the piston is confronted with a pressure chamber 20. The pressure chamber 20 is connected with the air spring 22 through an enclosing valve mechanism 31. Starting pressure, therefore, for pressure reducing action of each of pressure reducing valves 51, 52 is controlled according to carrying capacity of a vehicle. When troubles occur on an air spring system 22, pressure to be decided by set load of a valve spring 38 of a second control valve 36, of the enclosing valve mechanism 31 is enclosed within the pressure chamber 20. Starting pressure, therefore, for pressure reducing action of each of the pressure reducing valves 51, 52 is controlled by the enclosed pressure. |
