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Lap belt tensioner with buckle
Depending on country version, the AudiQ7 is equipped with lap
belt tensioners, igniter for seat belt tensioner 2 driver side N297
and igniter for seat belt tensioner 2 front passenger side N298 on
the driver and front passenger sides.
If lap belt tensioners are fitted, the seat belt of the automatic belt
retractor also comes fitted with a buckle.
When the seat belt is being worn, the lap belt tensioner in combi-
nation with the buckle performs the following tasks in the event of
an accident which meets the criteria for deployment:
• Separation of the force acting on the pelvis from the force
acting on the thorax
• Reduced chest compression
• Reduced upper thigh load
• Reduced forward displacement of the pelvis
• Improved interfacing between the pelvis and seat
637_044
Buckle
Automatic belt retractor
Belt deflector
Lap belt tensioner
Coupling
Accident response sequence
In the event of an accident which meets the criteria for deploy-
ment, the airbag control unit deploys the seat belt tensioners and
the lap belt tensioners. The seat belt is tensioned from the buckle
on up by the belt tensioner on the automatic belt retractor. For
safety reasons, the belt force is limited by the active belt force
limiter.
The lap belt tensioner tensions the part of the seat belt between
the occupant's pelvis and the buckle.
637_045
Seat belt travel
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