Function For Adaptive Seat Belt Force Limitation (Only USA/CDN)
In case of a front-end collision where the front airbags and the front seat belt tensioners (8/33 and 8/34) have deployed, the function for adaptive seat belt force limitation can also be activated. When the front airbag and the front seat belt tensioner are activated, the seat belt roller sensor (7/194, 7/195) starts to monitor the angle and the speed with which the seat belt is tensioned/tightened. The seat belt roller sensor sends information about the seat belt angle and speed to the Supplemental restraint system module (SRS) (4/9) in real time. The Supplemental restraint system module (SRS) also receives information from the seat position sensor (3/255, 3/256) about the position of the passenger or driver's seat. Then the control module can decide if the person in the vehicle is small or large. With this information the Supplemental restraint system module (SRS) decides if the seat belt force limiter shall be activated. If the adaptive seat belt force limiter (8/128, 8/129) is activated the Supplemental restraint system module (SRS) sends an activation signal, a current pulse, to the adaptive seat belt force limiter, which reduces the force from the seat belt on the chest.