Safety arrangement`s reversible belt-tensioner controlling method for motor vehicle, involves activating reversible belt-tensioner, when gradients of measured values characterizing vehicle dynamics exceed predetermined threshold value

摘要

The method involves determining temporal characteristics of measured values characterizing vehicle dynamics, and calculating gradients of the measured values characterizing vehicle dynamics. A reversible belt-tensioner is activated, when the gradients exceed a predetermined threshold value. The activating of the belt-tensioner also then takes place, when the measured values exceed another predetermined threshold value. An independent claim is also included for a safety arrangement for a motor vehicle.