Detailed description: Conditions: Notes

The system can be activated at several levels based on the impact force, seat position and use of belts. It is activated individually for the driver and passengers, which means that different decisions can be made for action depending on the seat position and whether or not the belt is in use.

The front airbags are activated in step 1 or step 2 under different impact forces.

Step 1 means a low force impact and step 2 a high force impact. The front airbag is activated earlier if the seatbelt is not fastened.

CV:  The roll-over function measures the angular velocity with a gyro and is dependent on the vehicle speed.

Front collision: 

At low force impact, the belt tensioners are used. One condition for activation of the driver and front-seat passenger belt tensioners is that the belt is in use.

If the impact force is greater, the front airbags are also activated in step 1 or step 2.

Step 1:

At this level, the battery disconnect switch is also activated and the first of the two stages of the front airbags, which means that around 80% of the maximum pressure is achieved.

Step 2:

4D:  At high impact force, the inflatable curtains and the second stage of the front airbag are activated. CV:  At high impact force, the roll bars and the second stage of the front airbag are activated

Activation of stage two takes place with 5 to 20 ms delay after step one, to achieve maximum protection. This means that step 1 (80% of max. pressure) and the trigger charge for step 2 are activated, which means that a further 20% of the maximum pressure is used. To activate step two, the seat must be more than 30% from its forward position

In the situation where the front airbags are only activated in step 1, a safety activation of step 2 takes place after 80 ms irrespective of seat position. This disarms the airbag so there is no charge left after the impact.