Evaluating the Sensor Signals
The sensor system of Advanced Crash and Safety Management is essentially the same in all models. It differs only in terms of the different crash-test requirements for specific markets (example: EU and US vehicles).
The Crash Safety Module incorporates a longitudinal-acceleration sensor and a lateral acceleration sensor. The sensors serve to detect and verify front-end, side-on and rear-end crashes.
In the E64 Convertible the Crash Safety Module has additional sensors for rollover detection.
Satellites are also integrated in the B-pillars. The satellites each consist of a longitudinal acceleration sensor and a lateral acceleration sensor.
Together with the lateral acceleration sensor in the Crash Safety Module, the lateral acceleration sensors serve to detect side-on crashes.
Door pressure sensors are also used in the front doors to detect side-on crashes.
Together with the longitudinal-acceleration sensor in the Crash Safety Module, the longitudinal-acceleration sensors serve to detect front- and rear-end crashes.
The acceleration sensors measure the positive acceleration (+) and the negative acceleration (- / deceleration) in the X and Y directions. The resultant from the X and Y signals is the definitive factor in determining the direction of the impact.
The vehicles have additional up-front sensors for front-end crash detection.