Locked wheel reapply in ABS control systems

Fluid-pressure and analogous brake systems – Speed-controlled – Pulse frequency or time period controlling pressure rebuild

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Details

303174, 303158, B60T 832

Patent

active

055383378

ABSTRACT:
An anti-skid braking system for wheeled vehicles having fluid actuated brakes associated with the vehicle wheels, speed sensors associated with the vehicle wheels and a cyclically operating control device which is responsive to speed signals from the speed sensors to actuate a pressure dump device to periodically release the fluid pressure applied to the brake of any wheel which is determined to be about to lock and to later re-apply the actuating pressure to that brake when the tendency of that wheel to lock has reduced, and wherein the pressure dump phase is arranged to be cancelled during wheel-lock when the aggregate dump time for the current cycle exceeds a limit value based upon a weighted-average dump time of previous cycles.

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