Friction coefficient determination for couplings in transmission in vehicles, involves reducing operational pressure with temporal progression and determining operational pressure at which rotational pressure exceeds zero

摘要

One drive shaft (14) is driven at a certain torque (T) and the other (15) is blocked during the calibration and the operational pressure is reduced with respect to a preset temporal progression. The operational pressure at which the difference in rotational speed exceeds zero is determined. The pull-off coefficient of friction of the coupling is calculated using the operational pressure, the torque (T) and the coupling constants.