METHOD FOR CONTROLLING A SPEED DIFFERENCE BETWEEN THE FRONT WHEELS AND REAR WHEELS OF A FOUR-WHEEL DRIVE VEHICLE

摘要

The invention relates to a method for controlling a speed difference between the speed of the wheels of the front axle and the speed of the wheels of the rear axle of a four-wheel drive vehicle. The invention is characterised in that the method comprises the following steps: determining an initial speed difference set point (Cinitial) based on the speed of the vehicle; determining one or more intermediate speed difference set points (Ci2,Ci3,Ci4) based on one or more operational parameters of the vehicle; modulating the initial speed difference set point (Cinitial) based on the intermediate speed difference set points (Ci2,Ci3,Ci4) in order to obtain a final speed difference (Cfinal) set point; measuring the speed difference and comparing the measured speed difference with the final speed difference set point (Cfinal); and controlling the measured speed difference, so that the measured speed difference reaches the final speed difference set point (Cfinal).