| 摘要 |
The invention relates to a method for adapting the control strategy of a slip- control system of a brake system of a vehicle in a μ-split situation, in which different wheel-specific brake pressures (Preq,wdc,i+1, 0, Preq, wdc, i+1, 1), which are determined on the basis of the control strategy of the slip-control system, are set at opposite vehicle wheels (LM-Rad 0, HM-Rad 1) of a vehicle axle, and the resulting brake pressure difference (Pdiff) is limited in the process. According to the invention, according to a first solution there is provision that in order to generate a brake pressure request (Preq,i+1,0, Preq,i+1,1), a maximum pressure difference value (Pdiff,i+1,0, Pdiff, i+1,1), which deviates from a reference pressure difference with a predefined tolerance value (pto1) is determined on a wheel-specific basis for the vehicle wheels (LM-Rad 0, HM-Rad 1) lying opposite one another, wherein the reference pressure difference corresponds to the value of the current low-pass-filtered brake pressure difference (Pfilt,diff,i), and the brake pressure request (Preq,i+i,0, Preq,i+1,1) for each vehicle wheel (LM-Rad 0, HM-Rad 1) is determined as a minimum of the wheel-specific brake pressure (Preq,wdc,i+1,0, Preq,wdc,i+1,1) which is determined from the control strategy of the slip-control system, and from the sum of the average brake pressure (pLM, PHM) of the vehicle wheel (LM-Rad 1, HM-Rad 0) lying opposite and the wheel-specific maximum pressure difference value (Pdiff,i+1,0, Pdiff, i+1,1). A second solution differs from the first-mentioned solution in that in order to determine the brake pressure requests (Preq,i+1,0, Preq,i+1,1) for the two vehicle wheels (LM-Rad 0, HM-Rad 1) the wheel-specific brake pressure (Preq,wdc,i+1,0, Preq, wdc, i+1, 1) which is determined according to the control strategy of the slip-control system for the wheel (LM-Rad 0, HM-Rad 1) lying opposite is not used but instead the average brake pressure (pLM, PHM) thereof is used. |
