Abstract: A compressed air operable wheeled trailer braking system includes a braking electronic control unit (ECU) having an electronically operable control valve which derives suitably proportioned load and vehicle speed dependent service brake pressure for brake chambers of the trailer wheeled. The braking ECU has a data memory storing specific braking parameters normally installed therein prior to commissioning the trailer. The trailer has a further diagnostic ECU responsive to vehicle operational sensors, the further ECU also having memory capacity. The specific braking parameters are stored via a communication link consequent upon installation thereof to the braking ECU. Upon recognizing installation of a replacement braking control unit, the parameters from the further ECU are installed in the replacement ECU.

Abstract: A compressed air operable wheeled trailer braking system includes an electronic braking control unit (ECU) 26 having an electronically operable control valve 22 which derives suitably proportioned load and vehicle speed dependent service brake pressure for brake chambers 23, 24, 25 of the trailer wheeled. The ECU 26 has a data memory storing specific braking parameters normally installed therein prior to commissioning the trailer and the trailer has a further diagnostic ECU 27 responsive to vehicle operational sensors, the further ECU also having memory capacity wherein said specific braking parameters are stored via a communication link consequent upon installation thereof to the braking ECU and means which recognizes installation of a replacement braking control unit 26 to install said parameters herein from said further ECU.

Abstract: A braking system comprising an anti-lock vehicle braking system for a vehicle having a pair of drive wheels (13, 14), the wheels of said pair being disposed on opposite sides of the vehicle, comprising a wheel speed sensor (17, 18) for each wheel (13, 14), a controller (19) responsive to wheel speed signals from said two wheel speed sensors (17, 18) for sensing skid conditions at said wheels (13, 14) and for generating skid control instructions, a wheel brake (23, 24) for each wheel (13, 14), responsive to fluid pressure, hereinafter referred to as brake pressure, supplied thereto, a common supply line (37), for supplying a common brake pressure for both of said brakes from a fluid pressure supply valve means (38) in accordance with a brake demand signal and a skid control means (40) controlled by said skid control instructions for modulating the common brake pressure, having a brake apply valve (51) to supply fluid under pressure to the common supply valve (39), in response to the controller detecting a whee