公开(公告)号：EP1483143A1

公开(公告)日：2004-12-08

申请号：EP03743341.4

申请日：2003-02-26

申请人： Continental Teves AG & Co. OHG

发明人： LÜDERS, Ulrich ,  OEHLER, Rainer ,  RASTE, Thomas ,  RAITZ VON FRENTZ, Hubertus

IPC分类号： B60T8/00

CPC分类号： B60W40/068 ,  B60T8/1725 ,  B60T2210/12 ,  B60T2240/03 ,  B60W2510/205 ,  B60W2520/10 ,  B60W2520/105 ,  B60W2520/125 ,  B60W2520/14 ,  B60W2520/26 ,  B60W2520/28 ,  B60W2530/20

摘要： Currently available systems for regulating driving dynamics, such as for example ESP or TCS, require in the driving dynamical limit range information about the actual maximum coefficient of friction (ν-max) between tires and roadway to function reliably. A proven approach is to use, once the regulation is active, the actual utilization of grip as the maximum coefficient of friction. The invention relates to a method for determining the actual maximum coefficient of friction (ν-max) independently from the activation of the regulation. According to the inventive method, values (C_x, C_y) are permanently determined that represent the utilization of grip in the longitudinal and/or transverse direction, based on measured and/or estimated variables that represent the actual longitudinal forces (F_x), lateral forces (F_y) and vertical forces (F_z) acting upon the individual wheels and tires, while using the measured or calculated actual state variables that represent the slip angle (α) and/or the slip angle velocity (α) and/or the longitudinal slip (η) and/or the longitudinal slip velocity (η). The determined values (C_x, C_y) are compared with threshold values (S_x, S_y) and are evaluated to determine the maximum coefficient of friction (ν-max) while using additional auxiliary variables if the resulting values of comparison are smaller than the threshold values.