During the driving process of the car, the sensor system continuously sends information about the speed change (or acceleration) to the control device. The control device (central controller) analyzes and judges the information. If the measured acceleration, speed change or other indicators exceed a predetermined value (that is, a real collision has occurred),
Then the control device sends the ignition command to the gas generator or the sensor directly controls the ignition. After the ignition, an explosion reaction occurs to generate N2 or the compressed nitrogen in the gas storage tank is released to fill the collision air bag.
When the occupant is in contact with the air bag, the collision energy is absorbed through the damping of the vent on the air bag to protect the occupant.
Car airbags contain sodium azide (NaN3) and ammonium nitrate (NH4NO3) and other substances.
When a car is hit hard at high speed, these substances quickly break down, producing a large amount of gas that fills the air bags.
[decomposition of sodium azide produce nitrogen gas and solid sodium, ammonium nitrate as the oxidant. New airbag joined the scalable charging or releasing pressure device, to prevent a sudden point detonation pressure head produce harm to people, especially at the time of passengers not wearing seat belts, can lead to life-threatening. Specific form are:
1, grade point detonation device, that is, two grade point detonation gas generator, the first level produces about 40% of the gas volume, is far lower than the maximum pressure, produce cushion to people moving head, 2 points remaining gas explosion, and the maximum stress. In general, two levels of deployment of the maximum pressure less than single stage. This kind of form, the pressure gradually increase.
2, hierarchical way of release stress, pouch with pressure relief holes or on the adjustable pressure of the hole, is divided into totally open with gas pressure or computer control of the Tether. This way, the first pressure to set limits, then the instantaneous release pressure, in order to avoid too much damage. The latest market dynamic at any time, please pay close attention to.
