Method and system for antilock braking on a deformable surface

Details Method and system for antilock braking on a deformable surface Method and system for antilock braking on a deformable surface

1995-02-03

1996-08-20

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Speed-controlled

Variable target slip values

303163, 303178, B60T 868

Patent

active

055472672

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.

REFERENCES:
patent: 3724916 (1973-04-01), Hirzel
patent: 3729234 (1973-04-01), Hirzel
patent: 3791701 (1974-02-01), Riordan
patent: 3838890 (1974-10-01), Wind
patent: 3953080 (1976-04-01), Bremer
patent: 3964796 (1976-06-01), Bremer
patent: 4037882 (1977-07-01), Taylor
patent: 4338669 (1982-07-01), Skarvada
patent: 4562542 (1985-12-01), Skarvada
patent: 4912744 (1990-03-01), Hurst
patent: 5358318 (1994-10-01), Ikeda et al.

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