Современное автомобилестроение. Сахарова Н.С. - 76 стр.

   Retardation force, control unit, impact force, crumple zone, safety sensor, front
safety impact sensor, self – contained capacitor pack, self – diagnostic unit.

     Exercise 8. Read the following text. Answer the questions given below.

     Effective supplement

   If a frontal collision should occur either head-on across a 60 degree arc in front of
the car, and at a speed higher than around 10 mph (with a retardation force of at least
16 g), one or both of the front sensors will trip and apply a signal to the electronic
control unit. as the collision progresses, the impact forces will be absorbed by the
special “crumple zones” at the front of the car.
   The safety sensor inside the control unit will trip at a retardation force of around 2
g. So the airbag will inflate within 20 to 30 milliseconds – thus preventing the driver
from being thrown against the steering wheel and facia.
   At least one of the front impact sensors and the safety sensor must both trip before
the Supplemental Restraint System will be activated in a minor frontal collision, a
rollover, or a side or rear collision.
   In addition to the safety impact sensor, the electronic control unit contains a self-
diagnostic unit for the Supplemental Restraint System. The control unit is also
equipped with a self-contained capacitor pack, which provides power for the system
even if the car’s electrical system should be damaged in the collision.
   The Supplemental Restraint System is just that – supplemental. It is not intended to
replace the primary restraint system – the seat belts. The seat belt provides restraint in
the sequence of events after the initial impact, which the airbag is not designed to
inflate.

            Questions
     1)   What happens if a frontal collision should occur?
     2)   What absorbs the impact forces as the collision progress?
     3)   What is the necessary retardation force which enables the safety sensor to trip?
     4)   What is the time needed for the airbag inflation?
     5)   What are the instances when the SRS won’t be actuated?
     6)   What is the role of a self-contained capacitor pack?
     7)   What is the intention of the SRS?
     8)   What makes the SRS to be the maximum safety means?

   Exercise 9. Speak on the topic “Effective Supplemental Restraint System ”, using
the following words.

Frontal collision, 60 degree arc, retardation force, electronic control unit, to absorb,
impact forces, crumple zones, safety sensor, airbag, to inflate, rollover, side or rear
collision, self-diagnostic unit, self-contained capacitor pack, primary restrained
system, non-frontal collision.
76