| 摘要 |
A braking system including a skid control system, in which the brakes are actuated from a source of hydraulic power with the magnitude of pressure to the brakes being varied generally as a function of the input force from the vehicle operator and; during controlled operation, as a function of the magnitude of an error signal indicative of an incipient skid or excessive slip condition. The pressure is varied by a valve system including a pilot valve receiving hydraulic pressure from the source of hydraulic power which is actuatable by the vehicle operator and by an electromotive means responsive to the error signal to provide hydraulic pressure variations over a first predetermined range of pressures. The valve system further includes a main valve connected to the actuators for the brakes which is responsive to the first range of pressures from the pilot valve so as to provide hydraulic pressure variations over a greater range of pressures for operating the brakes.
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