Loading ...
Loading ...
Loading ...
Seat belts
●
The slot in the seat belt buckle must not be
blocked with paper or other objects, as this
can prevent the latch plate from engaging se-
curely.
●
Never use seat belt clips, fastening rings or
similar items to alter the position of the belt
webbing.
●
Frayed or torn seat belts or damage to the
connections, belt retractors or parts of the
buckle could cause severe injuries in the
event of an accident. Therefore, you must
check the condition of all seat belts at regular
intervals.
●
Seat belts which have been worn in an acci-
dent and stretched must be replaced by a
specialised workshop. Renewal may be nec-
essary even if there is no apparent damage.
The belt anchorage should also be checked.
●
Do not attempt to repair a damaged seat
belt yourself. The seat belts must not be re-
moved or modified in any way.
●
The belts must be kept clean, otherwise the
retractors may not work properly.
Head-on collisions and the laws of
physics
Fig. 62 A driver not wearing a seat belt is
thrown forward violently
Fig. 63 The unbelted passenger in the rear
seat is thrown forward violently, hitting the
driver who is wearing a seat belt.
It is easy to explain how the laws of physics
work in the case of a head-on collision: when
a vehicle starts moving, a type of energy
called “kinetic energy” is created both in the
passengers and inside the vehicle.
The amount of “kinetic energy” depends on
the speed of the vehicle and the weight of
the vehicle and its passengers. The higher
they are, the more energy there is to be “ab-
sorbed” in the event of an accident.
The most significant factor, however, is the
speed of the vehicle. If the speed doubles
from 25 km/h (15 mph) to 50 km/h
(30 mph), for example, the corresponding ki-
netic energy is multiplied by four.
Given that the passengers of the vehicle in
our example do not have their seat belts fas-
tened, in the event of a collision the entire
amount of the passengers' kinetic energy will
be only absorbed by the mentioned impact.
Even at speeds of 30 km/h (19 mph) to
50 km/h (30 mph), the forces acting on bod-
ies in a collision can easily exceed one tonne
(1000 kg). At greater speed these forces are
even higher.
Vehicle occupants not wearing seat belts are
not “attached” to the vehicle. In a head-on
collision, they will move forward at the same
speed their vehicle was travelling just before
the impact. This example applies not only to
head-on collisions, but to all accidents and
collisions.
Even at low speeds the forces acting on the
body in a collision are so great that it is not
»
45
Technical specifications
AdviceOperationSafetyThe essentials
Loading ...
Loading ...
Loading ...