Patent ID: 6470731
Filing Date: 2002-10-29
Classification: B60K,B60T,B60W

Abstract:
Method of determining a characteristic quantity for an instantaneously maximum coefficient of friction between the tires of a vehicle and a roadway, comprising the steps of:i) obtaining data output values from at least one sensor, ii) calculating using said data output values a characteristic quantity of the coefficient of friction by way of a 95% sum frequency curve of a frequency distribution function of a plurality of coefficients of friction measured at a 100% slip value of said vehicle traveling in a longitudinal direction, iii) assigning said coefficient of friction to one of a first class in the event of wet road conditions and a second class in the event of non-wet road conditions, and iv) presenting the result of step iii), to the vehicle driver or a collision avoidance system of the vehicle, whereby a following time of said vehicle in relation to another vehicle that is directly in front thereof varies in the first class from 1.5 seconds to 3.5 seconds and in the second class from 0.9 seconds to 1.8 seconds.