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AssigneeLucas Industries public limited company
InventorsWolfgang Kampfmann, Hubert Schmitt, Dieter Voges
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An anti-lock braking method to retard the wheels of a vehicle provides that brake pressure be augmented or reduced or maintained constant in response to slip and/or the change in the rotational speed (positive or negative deceleration) of a retarded wheel as related to at least one threshold value, and the respective renewed accelerations of the retarded wheels be measured during successive control cycles of the anti-lock braking so as to raise the threshold value or prevent a reduction of the brake pressure for a predetermined period of time in order to suppress undesired control operations which are releasable above all by oscillations of the vehicle axle. To avoid interference of the ABS control by axle oscillations, it is provided that a raised threshold value is maintained for a given period of time and then lowered once more to the basic value if no wheel retardation is measured and the threshold value is not exceeded either during this given period of time, the given period of time being somewhat longer than one axle oscillation period of a vehicle axle, whereas in the event that the threshold value is failed to be reached within the given period of time, this will not initiate a reduction of the brake pressure of the wheel, and a period of time will be measured during which the threshold value remains to be fallen short of, and in the event that this measured period of time is shorter than a predetermined period of time, reduction of the brake pressure continues to be precluded for an additional period of time which is at least as long as one typical axle oscillation period of the vehicle axle.
An anti-lock braking method to retard wheels of a vehicle, wherein
Dependencies are inferred from the claim text.