Indirect Anti-Trapping

Indirect Anti-Trapping
Anti-trapping protection is active over the entire window travel in the closing direction. Indirect anti-trapping protection does not eliminate trapping completely but rather restricts it to a maximum permissible trapping force.
For each subsequent closing operation, the currently required closing force is determined and compared with the stored value. If the difference between the two force values is over the specified trigger threshold, the direction of window movement is reversed immediately. The reversing procedure is country- and function-dependent (emergency mode).
In order to ensure safe closing of the window glass, the drive mechanisms are briefly operated to their full extent when the zero position is reached at the upper stop.
Power-window anti-trapping protection has been developed in accordance with legal requirements in order to reliably prevent injury to vehicle occupants. When an object is detected in the path of the window, window travel is stopped and the window rolled down slightly.
Anti-trapping protection is deactivated by the emergency close function (panic mode). The control sequence is divided into two phases.

Phase 1:
The closing position is overdressed until the emergency close mode is activated after a specific response time. The window is closed at maximum speed and with increased anti-trapping protection force. Anti-trapping protection remains activated even during emergency closing. If trapping is detected, the window is reversed only a short distance.

Phase 2:
The button is released and overpulled again in 4 s. The window is now closed without anti trapping protection with full force. In the event of blocking, the power-window motor is supplied with power until thermal protection is engaged.
In the event of faulty anti-trapping protection, there is the option of emergency-closing the windows.
If fully operational anti-trapping protection cannot be detected, e.g. faulty sensors, automatic operation is not permitted.