FAQ

Airbags

Q001 How many airbags are installed in a single automobile?
A001

In addition to the airbag for the driver´s seat and the airbag for the front passenger seat, some vehicles may include airbags installed on both sides of the front seats and both sides of the rear seats to protect occupants against the effects of side collisions, plus curtain airbags for protecting against head injury. In addition, there are airbags for protecting passengers´ knees and lower limbs. Today, some automobiles are equipped with 10 or more airbags.

Q002 I would like to find out whether an airbag has been installed for the driver´s seat. How can I determine this?
A002

If the letters "SRS" (supplemental restraint system) appear on the steering wheel, then an airbag has been installed for the driver´s seat. When an airbag has been installed for the front passenger seat "SRS" will appear on the upper surface of the dashboard. In addition, on the reverse side of the sun visors there will be a printed message calling attention to the installation of airbags.

Q003 The abbreviation "SRS" appears around seats protected by airbags. What does this mean?
A003

SRS is an acronym for "supplemental restraint system." When a collision occurs, the seat belts are the first line of defense in passenger protection and restrain the passengers in their seats. Thereafter the airbag system provides supplementary restraint, which seat belts alone cannot provide. This helps to protect the heads and chests of passengers. When airbags are used in combination with seat belts, they are best able to perform their safety functions, and thus the term "supplemental restraint system" is used.

Q004 When do airbags inflate?
A004

In general, airbags are set to inflate when there is a danger that the passengers may sustain injuries.

  • The driver´s seat and front passenger seat airbags inflate in the following circumstances:
    • When the vehicle experiences a shock comparable to, or greater than, colliding with an immobile object as hard as concrete at a speed of between 20 to 30 kilometers per hour
    • When the vehicle encounters a strong shock on the left or right at an angle of 30°or less.
    • The airbags may also inflate when the vehicle is struck with a hard blow from below:
      • When the vehicle strikes a curbstone or a similar obstacle
      • When the vehicle falls into, or goes over, a deep hole or trench
      • When the vehicle collides with a protruding or other object
      • When the vehicle jumps and lands on the ground
      • When the vehicle falls from a height
  • Side airbags and curtain airbags inflate in the following circumstances:
    • When the vehicle experiences a direct collision on the side of the passenger compartment at a speed of 20 to 30 kilometers per house, or an even stronger shock.
    • The airbags may also inflate when the vehicle is struck with a hard blow from below:
      • When the vehicle strikes a curbstone or a similar obstacle
      • When the vehicle falls into, or goes over, a deep hole or trench
      • When the vehicle collides with a protruding or other object
      • When the vehicle jumps and land on the ground
      • When the vehicle falls from a height
Q005 Do airbags always inflate when they receive a shock?
A005

In general, airbags are set to inflate when there is a danger that the passengers may sustain injuries, but there are cases where they do not inflate even when they receive a blow or shock.

  • The driver´s seat and front passenger seat airbags may not inflate in the following circumstances:
    • When the vehicle experiences a front-end collision at a low speed
    • When the vehicle receives a shock from the side or rear at low speeds
    • When the vehicle rolls over or is turned over
    • When the vehicle strikes a utility pole, tree, or similar objective at low speeds
    • When the vehicle experiences a partial collision or a collision from an angle
    • When the vehicle slides under the cargo platform of a truck or in similar circumstances where the impact is partially absorbed.
  • Side airbags and curtain airbags may not inflate in the following circumstances:
    • When the vehicle experiences a side collision at a low speed
    • When the vehicle receives a shock on the side from an angle at low speeds
    • When the vehicle experiences a shock on a part other than the side of the passenger section
    • When the vehicle experiences a shock from the front or rear
    • When the vehicle rolls over or is turned over
Q006 How quickly can airbags go into operation?
A006

This depends on the type of airbag, but airbags for the driver´s seat go into action in 50/1,000th of a second. This is between about one-half to one-fourth the time it takes to blink an eye, which normally takes 100/1,000th to 200/1,000th of a second.

Q007 How large are airbags in terms of volume?
A007

Their volume depends on the type of airbag, but the airbag for the driver´s seat has a volume of between 50 and 60 liters. The airbag for the front passenger seat is about twice as large as the airbag for the driver and ranges from 90 to 120 liters in volume.

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