Process and system for anti-lock control

Details Process and system for anti-lock control Process and system for anti-lock control

1993-01-11

1993-08-31

Graham, Matthew C.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

303 221, B60T 802, B60T 818

Patent

active

052403122

ABSTRACT:
A process for anti-lock control on a racing vehicle having an aerodynamic design which results, at high speeds, in a clear increase both of the front-axle load and the rear-axle load of the vehicle. On a wheel requiring control, the response of the anti-lock control is triggered in the direction of a brake-pressure reduction when an axle-related reference quantity K.sub.h or K.sub.v, formed as a sum of weighted amounts of the wheel-circumference deceleration Z and of the brake slip of the respective vehicle wheel related to a reference speed, exceeds a threshold value. At least during the formation of the reference quantity critical for the front axle, the reciprocal value of the locking limit, determined with inclusion of negative lift forces and air resistance, of the vehicle wheels, plus a safety value .DELTA.Z.sub.o, is taken as a weighting factor X.sub.v. Within the framework of an anti-lock system suitable for carrying out the process, a brake unit switchable to different values of the brake-force distribution under the control of its electronic control unit is provided.

REFERENCES:
patent: 4093316 (1978-09-01), Reinecke
patent: 4418966 (1983-12-01), Hattwig
patent: 4795219 (1989-01-01), Brearley et al.
patent: 4863221 (1989-09-01), McNinch, Jr.
"Berechnung und Rekonstruktion des Bremsverhaltens von PKW" Burchhardt et al, Verlag Information Ambs GmbH pp. 53-82.

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