- Frontal collision of a car.
- Car hit from behind.
- Side collision.
- Vehicle overturning.
All seat belt winders have an emergency lock. Under normal conditions, the retractors of the seat belts are unlocked and do not interfere with the movements of the driver and passengers. The pendulum lock blocks the retractor coil in the following cases:
- Quick release of the seat belt webbing from the reel mechanism.
- Sudden change in vehicle speed.
- Sudden change in vehicle direction.
- Vehicle driving on steep hills or descents.
The seat belts have an automatic locking function which is activated when the seat belt is completely removed from the reel mechanism. This function is used, for example, to secure child seats.
Additional passive safety system (SRS or SIR) provides protection for the driver and passengers in addition to seat belts. It consists of a control and diagnostic unit, airbags, seat belt pretensioners (on holders and winders) and shock sensors. The control unit determines the severity of the collision based on signals from impact sensors located at strategic points in the vehicle. When the control unit detects a collision, it processes the information and, if the impact is strong enough, it sends a signal to activate the corresponding airbags and pretensioners. If the impact force is insufficient, the control unit can only activate the seat belt pretensioners. To analyze the severity of the collision, the passive safety control unit translates the change in the speed value into an electrical signal and compares its value with the reference values stored in the memory. If the signal value exceeds the set value, the control unit determines the severity of the collision and, based on this, sends a command pulse to the airbags and pretensioners, or activates only the pretensioners. The SRS control unit continuously monitors the system in order to identify the occurrence of a malfunction. If a malfunction is detected, the control unit sends a fault code and provides appropriate information to the driver through the SRS indicator. The steering column and knee buffers are designed to absorb impact energy by deforming in a frontal collision in order to limit the movement of the driver's legs and reduce the risk of injury to the driver and passengers.
If necessary, for example, when placing a child seat in the front seat, the front passenger airbag can be turned off with a special switch.
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