| 摘要 |
<p>A pedal-operated master cylinder 20 is connected directly to a first slave cylinder 48 by a hydraulic connection 23. An auxiliary hydraulic reservoir 26 having an operating pressure is selectively connected to a second slave cylinder 58 via a boost valve 24 in response to a pilot pressure communicated from the hydraulic connection. By exploiting the pressure from an auxiliary hydraulic reservoir to provide a boost braking force, the force exerted by the driver in normal use to depress the brake pedal is reduced. However, in event of failure of the boost valve, the brakes can still be applied by a direct application of force from the pedal 32. The braking system may be used on a tractor with left and right braking systems to aid steering, fig 1.</p> |
