| 摘要 |
To improve the control behavior of an ABS, a driving situation on a low coefficient of friction is quickly and reliably identified. To this end, the reacceleration of the non-driven wheels following a control-induced braking pressure reduction is analyzed, and the existence of a low coefficient of friction is identified if simultaneously in the reacceleration phase the maximum reacceleration of the two non-driven wheels is below a predefined limit value and the maximum filtered acceleration is below a specific predefined limit value, and if the duration of the positive variation of the filtered acceleration in this phase exceeds a predetermined time limit value. When these conditions are satisfied, braking pressure reduction in the following instability phase of the wheels is increased, for example, by a permanent actuation of the pressure reducing valves. |
