Method and apparatus for determining a symmetrical and asymmetrical together impact events with improved error function tolerances

摘要

A device (10) for controlling a multi-stage occupant holding the rear of the system (14, 18) of a vehicle comprises a together impact sensor (32), which the collision - acceleration at a substantially central position of the vehicle senses. A crush zones - an accelerometer (40, 42) provides a crush zones - acceleration signal before. A control device (50) determines a collision - speed value and a collision - distance value, in response to the collision - acceleration signal, before. A plurality of predetermined threshold value - cards (152 - 172) of a collision - speed as a function of the collision - distance, it is provided with two of said plurality of the threshold value - cards (170, 172) to a second stage (92, 96) of the operating multi-stage occupant rear relate the holding system. The control device selects one of the two threshold value - cards, which is located on the second stage, and controls the actuation of the second stage, in response to a comparison of the collision - speed - signal with the selected one of the two threshold value - cards (170, 172). Improved error function tolerances are such as use - mappings also provided on the symmetrical and asymmetrical collision - perception are based.