METHOD AND APPARATUS FOR CONTROLLING TORQUE DISTRIBUTION OF ALL-WHEEL CLUTCH FOR MOTOR VEHICLE THAT IS AT LEAST SELECTIVELY FOUR-WHEEL DRIVEN

PROBLEM TO BE SOLVED: To provide a method and apparatus for controlling a torque distribution of an all-wheel clutch for a motor vehicle that is at least selectively four-wheel driven.SOLUTION: A motor vehicle includes a clutch-controlled all-wheel drive device with a first axle and a second axle. A changeable setting of an all-wheel clutch 2 sets a desired torque distribution to the first axle 12 and the second axle 22. In this case, on the basis of a series of measurement data of a tire slip of each wheel of the first axle 12 and the second axle 22 of the motor vehicle 1 and on the basis of at least one characteristic map of the tire slip of the wheels, in dependence on a longitudinal force acting on each wheel, an actual torque distribution of the all-wheel clutch 2 to the first and second axles is determined via the longitudinal forces of the wheels. In this case, by comparing the determined actual torque distribution of the all-wheel clutch 2 with the desired torque distribution of the all-wheel clutch 2, a control difference is obtained, and is supplied to a control circuit for controlling the torque distribution to the all-wheel clutch 2.