Anti lock braking system for vehicle

Details Anti lock braking system for vehicle Anti lock braking system for vehicle

1987-11-17

1989-04-11

Kashnikow, Andres

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

303DIG4, B60T 858

Patent

active

048199940

ABSTRACT:
An anti lock braking system for a vehicle includes transducers acoustically coupled to a non-rotating member of the wheel assembly and adapted to provide an electrical output signal dependent upon the degree of acoustic emission activity in the non-rotating member. A detector is adpated to analyze when the electrical output signal which corresponds to the= acoustic emission activity in the non-rotating member falls to zero when brake pads are in frictional contact with the confronting surface of the wheel. The detector is adpted to send a feedback signal to a control device which controls the pressure applied to the wheel by the brake pads. Preferably the detector measures the instantaneous change of electrical output signal as a funtcion of the pressure applied by the brake pad. If the slope of the function is positive, the brake pressure is allowed to increase, if the slope is negative, the brake pressure is reduced and if the slope is zero the brake pressure is maintained so that maximum braking efficiency is obtained.

REFERENCES:
patent: 3124220 (1964-03-01), Kell
patent: 3630578 (1971-12-01), Kaiser
patent: 3998496 (1976-12-01), Bernabo et al.
patent: 4289358 (1981-09-01), Dufft et al.
patent: 4743074 (1988-05-01), Inoue

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