Patent ID: 8205830

Claim:
An aircraft braking system hydraulic fluid control apparatus for replacing a pressure reducing valve of an aircraft braking system, the apparatus comprising: electrical control circuitry for receiving an input signal representative of a hydraulic brake demand from a user of an aircraft to which the system is fitted in use and generating an electrical control signal in response thereto; and hydraulic control means for variably controlling a hydraulic braking output in response to the electrical control signal, the hydraulic control means for variably controlling the hydraulic braking output being coupled to the electrical control circuitry for receiving said electrical control signal, the hydraulic control means arranged to apply the hydraulic braking output to one or more brake assemblies; wherein said electrical control circuitry is operable such that on receipt of a braking demand signal corresponding to a hydraulic output profile that would exceed acceptable mechanical parameters of the airframe to which the braking system is fitted, in use, it generates an electrical control signal profile irrespective of said input signal, to cause said hydraulic control means to provide the hydraulic braking output of a predetermined hydraulic output profile within acceptable mechanical parameters of the airframe.