The transverse acceleration sensor is installed horizontally next to the driver's seat on the door sill approx. 5 cm in front of the B-pillar.
Connector assignments:
Pin No. |
Signal |
|---|---|
1 |
Sensor signal |
2 |
Negative supply (0 V) |
3 |
Positive supply (5 V) |
The sensor supplies an analog voltage of 0.5 - 4.5 V which corresponds to a measuring range of -1.5 - to +3.5 g.
The offset value is 1.7 V (vehicle stationary on horizontal surface).
After initialization, the DSC3 control unit calibrates the transverse acceleration signal both while the vehicle is stationary as well as while driving and continuously monitors its plausibility by comparing it with other sensor signals.
The transverse acceleration sensor is a capacitive sensor.
Under the effects of acceleration, a moving capacitor plate in the sensor is raised from a fixed capacitor plate. The signal voltage which occurs corresponds to the initiated acceleration.
The transverse acceleration signal is used in the DSC3 logic as an input signal for the higher-ranking vehicle controller. A nominal rotation rate is calculated on the basis of the measured transverse acceleration. On reaching the cornering limit speed this, nominal rotation rate corresponds to a cornering rate which is still stable under the given driving conditions.