Function For Adaptive SEATBELT Force Limitation (Only XC60 Or USA/CDN)
In case of a front-end collision where the front airbags and the front belt tensioners (8/33 and 8/34) have deployed, the function for adaptive belt force limitation can also be triggered. When the front airbags and the front belt tensioners are deployed, the belt retractor sensor (7/194, 7/195) starts to monitor the angle and the speed with which the seat belt is tensioned/tightened. The belt retractor 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 determine if the person in the vehicle is small or large. With this information, the supplemental restraint system module (SRS) decides if the belt force limiter should be deployed. If the adaptive belt force limiter (8/128, 8/129) is deployed, the supplemental restraint system module (SRS) sends a deployment signal (current pulse) to the adaptive belt force limiter, which reduces the force from the seat belt against the chest.