Door Pressure Sensors
The function of the door pressure sensors (1) is to provide supplementary detection of side impacts in addition to the information supplied by the lateral acceleration sensors in the B-pillar satellites and the MRS4RD control unit. The door pressure sensors are located on the inner door panel and measure the pressure inside the door.
In the event of a side impact, the outer door panel may be pushed inwards, thus compressing the space inside the door and increasing the pressure. That pressure increase is detected by the door pressure sensors. At the same time, the side impact is detected by the acceleration sensors in the B-pillar satellite. The B-pillar satellite then also transmits a data message. The MRS4RD control unit in the center of the vehicle processes the two signals and is able to trigger the restraint systems on the basis of the information provided.