Patent ID: 8577506

Claim:
A control valve conditioning method in an electrohydraulic pressure control unit comprising at least one electrically actuated solenoid valve which is controlled in an analog manner and is operated at a specific operating current in accordance with a functional relationship or characteristic map between the valve current and the differential pressure characteristic curve, said functional relationship or characteristic map being stored in the pressure control unit, during a pressure control operation, said method comprising the steps of: a) applying at least one antihysteresis pulse to the solenoid valve, during which antihysteresis pulse a current is set either below the operating current or above the operating current in the valve, b) applying the antihysteresis pulse at the desired operating current before or during the control operation, c) applying the antihysteresis pulse in such a short time that the brake pressure remains largely unaffected by said antihysteresis pulse, and d) applying the antihysteresis pulse before each increase in pressure and reduction in pressure.