Method and system for antilock braking on a deformable surface

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

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303157, 303174, 303165, B60T 868

Patent

active

056429207

ABSTRACT:
A brake pressure controller, responsive to a wheel speed sensor and coupled to a brake, performs a cyclic control of pressure applied to the brake. A brake pressure cycle includes a pressure apply stage and a pressure dump stage having activation conditions based upon a slip threshold parameter. A predetermined base threshold quantity is modified in dependence upon a measured time duration of the pressure dump stage and/or a slip depth error quantity so that a greater amount of slip is added to the base slip threshold when braking on a deformable surface than when braking on a non-deformable surface.

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