323001056 - E7030 AIR BAG - DESCRIPTION
DESCRIPTION
The vehicle is equipped with an electronic control system that governs the activation of specific containment devices in the event of frontal or side impact.For frontal protection, the system includes:- driver and passenger front air bags with two-stage activation;- front belts with pretensioner and regressive load limiter;- decentralised supplementary front impact detection sensor.The side protection system - only present on the most extensive versions - consists of:- two window bags housed in the under-roof side members;- two front side bags, housed in the seat backrests;- two impact detection sensors located in the central pillar.The frontal protection system adopts an Air-Bag Smart 2 activation strategy that is able to adapt the activation parameters automatically according to impact severity.Driver and passenger front airbags feature two-stage activation:- when the impact is of moderate severity, the electronic control unit controls the first airbag activation stage and then, following a significant temperature increase, the second stage so that the energy discharged onto the occupant is not harmful;- for very severe impacts, the control unit activates the second stage after a small temperature rise, i.e. almost immediately, so that as much of the occupant''s kinetic energy as possible can be absorbed before he or she strikes the steering wheel or dashboard.A supplementary ECS “Early Crash Sensor” on the front beam also helps the electronic control unit to operate more quickly than a conventional system so that the airbag activation stage is completed before the occupant''s body begins to move towards the steering wheel or dashboard.The control unit is located under the centre console and is securely fastened to the bodyshell: in this way the deceleration sensors located inside the unit are near the centre of gravity and detect the deceleration for the entire vehicle accurately.There are two stages for the front Air Bag modules: the first intervenes at an initial impact level, the second in the case of a more serious impact.The driver side air bag module is located in the middle of the steering wheel. It is fitted on a rocker plate that is also used to control the horns. The plate houses a metal container that contains the folded bag and the gas generation device that inflates the bag.A clock spring allows the connecting cables for the Air Bag module to follow the rotation of the steering wheel without danger of breaking.The passenger Air Bag is located on the dashboard, and is fastened directly to the vehicle crossmember by means of a special bracket.The Side Bag protects the chest area and also - together with the door panels - protects critical areas of the body such as the ribs and abdomen. Its position on the seat always ensures maximum efficacy irrespective of seat position, even if the seat occupant is not seated correctly, because bag opening dynamics minimise the risk of body damage due to impact against the body.The window bags are activated together with the sidebags and interpose themselves between the occupant and the vehicle to prevent the head coming into contact with highly intrusive objects such as glass, pillars etc.Because the window bags extend from the front pillar to the luggage compartment, they protect front and rear passengers. The window bag system offers the best performance due to the broad area covered and their ability to be self-supporting even without a backing.The pretensionsers are located on the front seat belt reels. Activation of the seat belt pretensioners is controlled by the same strategy as the air bags.The pretensioners are designed to take up slack in the seat belt to ensure it holds the occupant against the backrest from the first moments of impact, thus reducing movement inside the passenger compartment.The control unit is equipped with a self-diagnostic function:- it detects and stores faults;- it recognises the various components and the fault type;- it indicates the onset of faults by means of the special warning light.The activation of the system following a particularly serious impact is memorized by the control unit.When the system autodiagnostic function detects a fault or an impact is recorded, the control unit sends a signal, via the CAN, for the Air Bag fault warning light located on the instrument panel.If it is vital to transport a baby in the front seat, the passenger front and side bags can be deactivated using the specific instructions in the digital / multifunction / reconfigurable multifunction display in the instrument panel via the "Mode", "+" and "-" buttons in the left control panel.The warning light in the instrument panel will remain on constantly until the front passenger and side bags are reactivated.The vehicle is fitted with an S.B.R. system (Seat Belt Reminder) comprising a buzzer which, together with the seat belt not fastened warning light flashing, indicates that the driver''s or passenger''s (if present) seat belt has not been fastened. The latter warning light uses information from the two switches in the front seat belt buckle and a passenger presence sensor under the cushion. | This information does NOT affect the Air Bag activating logic. |
 | When operations are carried out to the Air Bag system, the following safety recommendations must be closely followed. For more details Op. 5580C AIR BAG SYSTEM |