WHEEL SPEED SIGNAL PROCESSING CIRCUIT FOR WHEEL SLIP CONTROL SYSTEMS

摘要

A control system for varying the pressure applied to fluid-controlled brake actuating mechanisms upon detection of both a wheel deceleration in excess of a predetermined threshold and a subsequent incremental decrease in wheel velocity greater than a continuously-varying reference increment DELTA v of wheel speed. This reference increment DELTA v is inversely related to a variable reference signal which is directly related to the rate of change of wheel speed. Thus, the continuously-varying reference increment of wheel speed DELTA v is inversely related to the rate of change of wheel speed. Consequently, the period of time between occurrence of a wheel deceleration in excess of said predetermined threshold and the relief of brake line fluid pressure is shorter when wheel speed decreases rapidly and longer when wheel speed decreases slowly. Compensation is thus made for varying road and load conditions, and for the characteristics of the braking mechanism which applies braking force to the wheel.