Patent ID: 6691016
Filing Date: 2004-02-10
Classification: B60T

Abstract:
A method for reducing wheel slippage of a motor vehicle having at least one axle (2) on which steerable wheels (7, 8) are rotatingly mounted and having at least one axle (1, 2) with wheels (5, 6, 7, 8) which are driven by a differential drive (3, 4) whereby, in case of wheel slip of one of the wheels of a driven axle (1, 2) one of a brake (16, 17) assigned thereto and a differential slip control is activated and controlled, the method comprising the steps of:determining a rotational speed of the wheels (5, 6, 7, 8); computing from use of vehicle parameters and from the rotational speed of the wheels (6, 8) on a right vehicle side of an axle and from the rotational speed of the wheels (5, 7) on a left vehicle side of an axle (1, 2), a virtual curve radius (rvirt); computing a steering angle (&agr;a, &agr;i) of the steerable wheels (7, 8) of the at least one axle (2); computing a desired radius (rsoll) from one of an average steering angle &agr;m of the wheels (7, 8) and from a corresponding steering angle of a steering gear (14) by the use of the vehicle parameters; comparing the virtual curve radius (rvirt) with the desired radius (rsoll); and using a result of the comparison for forming a characteristic value which serves for one of activating the assigned brake (16, 17) and activating the differential slip control of the differential drive (3, 4).