SBC additional functions, function - GF42.46-P-2000TA
MODEL 211.004/006/016/023/026/028/042/056/061/065/070/076/206/216/223/226/242/256/261/265/270/276/606/616 as of 1.6.04 up to 31.5.06, 211.080/082/083/087/280/282/283 as of 1.12.04 up to 31.5.06 except CODE (494) USA version except CODE (498) Japan version
MODEL 211.004/006/016/023/026/028/042/056/061/065/070/076/206/216/223/226/242/256/261/265/270/276/606/616 as of 1.6.04 up to 30.6.06, 211.080/082/083/087/280/282/283 as of 1.12.04 up to 30.6.06 with CODE (494) USA version with CODE (498) Japan version
Function
SBC contains a series of functions which serve to make life easier for the driver or to assist braking readiness and thus safety.
Safety-relevant functions
Precharging
(overcoming play)
This function, which is always active, assists the braking readiness by immediately and briefly applying the brake pads (precharging) if the driver releases the accelerator pedal quickly.
This reduces the brake pressure buildup and shortens the stopping distance during normal operation.
Dry braking
This safety function helps to ensure that the vehicle is ready to brake if the brake disks are wet by briefly dry braking them.
Wet conditions are recognized via the activation of the windshield wipers. The SBC control unit (A7/3n1) receives the information on windshield wiper frequency via CAN.
This reduces the brake pressure buildup and shortens the stopping distance during normal operation.
Dry braking is carried out roughly every 7 to 14 minutes depending on the amount of precipitation, provided that the driver does not brake in the meantime.
Comfort-relevant functions
SBC Hold
This function prevents the vehicle rolling backwards on a slope or during long idle times at traffic lights and therefore provides start-off assistance.
Operation
The SBC Hold function is activated by "overpressing".
That is to say, when the vehicle is stationary and the driver's foot is on the brake pedal, the driver briefly depresses the brake pedal with slightly more force.
The activation which has taken place is shown permanently by "SBC H" in the multifunction display (A1p13) in the instrument cluster (A1).
Life can thus be made easier for the driver while he can take his foot off the brake pedal.
The holding function is deactivated:
- When the driver presses the accelerator pedal and the vehicle starts to move.
- When the selector lever of the automatic transmission is moved into position "P".
- And by pressing the brake pedal again with the specified brake pressure until the display "SBC Hold" goes out.
Warning information "Brake immediately" appears in the multifunction display (A1p13) of the instrument cluster (A1) when SBC Hold is active and when a door is open and simultaneously a driver seat belt lock is opened or faulty as well as in the event of a system failure.
Function
If the specified deceleration calculated by the SBC control unit from the brake pedal travel exceeds A7/3n1) a specified threshold when "overbraking", then a fixed brake pressure is adjusted. The depressurization when starting off takes place based on comfort depending on the degree of the gradient or ascents
Softstop
By lowering the brake pressure briefly below 6 km/h Softstop reduces the jolt which occurs immediately upon reaching a standstill when braking
This function is deactivated during emergency and full braking in order to optimize the stopping distance.
| SBC normal braking, function | GF42.46-P-1000T |
| SBC function brake application in the event of system fault | GF42.46-P-3000T |
| SBC control unit, location/task/function | GF42.46-P-4500SL |