| 摘要 |
PURPOSE:To enable an optimum braking force to be applied in response to movable loads of rear wheels by applying an air pressure which is inversely proportional to a signal generated by air pressure of an air spring of a rear wheel suspending an air spring, to a back pressure chamber of a master cylinder. CONSTITUTION:The air pressure of an air spring 33 changes with movable loads. Therefore, as the air pressure is high when a car is loaded, the air pressure presses a piston 2 up overcoming a spring (3) force where a valve disc 16 is apart from a relay valve 6 allowing atmospheric pressure to be applied to a back pressure chamber 53 of a master cylinder 3 through a filter 9a, a chamber 4, and a piping 36. Accordingly, the back pressure acting on a piston 54 is zero. On the other hand, as the air pressure applied to a chamber 1 is reduced when the car is empty, the piston 2 is pressed down by the spring 3 allowing the relay valve 16 to be pressed down. Consequently, this causes the presurized air in an air reservoir 26 to be applied to the back pressure side of the master cylinder 31. |
