Drive-slip control system
AssigneeRobert Bosch GmbH
InventorJohannes Schmitt
Life of this patent
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Abstract
A pressure build-up pulse is provided at the brake of a driven wheel each time slippage of the driven wheel exceeds one of a series of successively larger threshold values. Build-up pulses continue until the slippage falls below the last threshold value exceeded, and pressure reduction pluses are effected each time the slippage falls below a succeeding smaller threshold value. If the slippage does not fall below the last exceeded threshold value by a given time, a build-up pulse is initiated even if the next higher threshold value is not exceeded.
Claims7
Drive slip control system for a vehicle having brakes at respective driven wheels, said vehicle exhibiting a vehicle speed, said wheels exhibiting respective wheel speeds, said system comprising
- means for determining a reference speed which approximates the vehicle speed,
- means for determining the speed of each driven wheel,
- pressure increase valve means at the brake of each driven wheel,
- pressure reduction valve means at the brake of each driven wheel,
- means for determining a deviation of the speed of each driven wheel from the reference speed,
- means for comparing said deviation to a plurality of successively larger deviation threshold values beginning with a first deviation threshold value, and
- means for supplying a pressure build-up pulse to the pressure increase valve means of a driven wheel each time the deviation for said driven wheel exceeds one of said threshold values.
Dependencies are inferred from the claim text.