What is the principle of car airbag It consists of several parts

Airbags are generally composed of sensors, electronic control units (ECUs), inflators, bags, clocksprings, etc., and usually the inflators and airbags are made together to form an airbag module. The sensor feels the intensity of the car collision and transmits the felt signal to the controller, the controller receives the signal of the sensor and processes it, when it judges that it is necessary to open the airbag, it immediately sends out an ignition signal to trigger the gas generator, and after the gas generator receives the ignition signal, it quickly ignition well produces a large amount of gas to inflate the air bag. The most important indicator of an airbag is reliability, if it should not be ignited and the ignition opens the airbag is called misignition

If it should be ignited but not ignited, it is called leakage ignition, and if ignition is too late, it is called late ignition, whether it is misignition, leakage ignition, or late ignition is not allowed. In order to improve the reliability of the airbag system and prevent the power cord from being interrupted in a collision and the battery from being damaged, the system is equipped with energy storage capacitors or batteries to ensure that the airbag can be opened even if the power is lost. To monitor sensors, electronic circuits, gas generators; The system generally also has a fault diagnosis module and a signal light to display.

Automotive airbag systems generally have a left and right baffle sensor, and a sensor placed in a controller containing a diagnostic module, and the airbag has a frontal collision airbag for the driver side and a frontal collision airbag for the passenger seat, as well as warning lights. When a front collision occurs, as long as one of the two baffle sensors is closed, the diagnostic module will process and judge according to the signal sent, and send an ignition signal to inflate the airbag when it deems it necessary to ignite.

Since 1886, Carl Benz invented the automobile, which has undergone countless developments and changes, and has been constantly updated to have better and better performance, and now it has become an indispensable part of our lives, saving us a lot of time, improving efficiency, and is a symbol of identity and status.

AirbagsIt is generally composed of sensors (sensor), electronic control unit (ECU), inflator (inflator), airbag (bag), freewheel (clockspring), etc., today let's take a look at the working principle of airbags.

1. The electrical signal received from the collision sensor is transmitted to the detonator of the inflator.

2. The detonator is like an "electric match" that ignites after being energized, and then ignites the detonator in the inflator assembly, which is also called the detonator.

3. After the explosion expander is ignited, the main charge - the main propellant is ignited. Conventional main propellants consist of sodium nitride plus oxidizer, with some using compressed nitrogen or argon.

There are also two hybrid applications.

4. Propellant combustion generates nitrogen streams.

5. The rapidly expanding gas is filtered into the bladder pad to form the prototype of the airbag.

6. The inflator increases the pressure of the gas charged into the airbag and begins to push the airbag cover.

7. The pressure on the airbag cover continues to rise, and the cover material extends and deforms and tears the seams in the weak area.

8. With the appearance of cracks, the cover door is opened to provide the best channel for the spraying of inflatable airbags.

9. The gas pressure continues to increase, and the airbag opens until the fabric is tightened.

10. The occupants contact and compress the airbag to achieve safety protection; Through the viscous damping effect of the gas, the energy of the occupant moving forward is absorbed and dissipated, and the overpressure gas in the airbag is discharged through the airbag vent without injuring the occupants.

The airbag is the moment the vehicle is rear-ended or crashed, and then that has a uh, sensor, and then this sensor has a signal to the uh airbag control unit, the group control unit, and then launches this. command, and then pop that airbag out, and then protect the person's safety.

The principle of airbags in the car is as follows: 1. When the vehicle collides, the airbag control tree module quickly processes the signal to confirm that the severity of the collision has exceeded the protective ability of the seat belt, and then quickly releases the airbag, so that the head and chest of the occupants are directly in contact with the softer and more elastic airbags, so as to reduce the injury of the occupants through the slowing of the airbags; 2. Generally speaking, a slight collision will not open the airbag, only within a certain angle of the front of the vehicle is the effective collision range of the airbag, rear collision, side collision, flip will not cause the airbag to open; 3. It should be emphasized that the airbag is only an auxiliary, and in the case of not wearing a seat belt, the airbag not only can not protect the occupants, but also have serious lethality to the occupants.

The explosive force of the airbag is staggering, enough to break the driver's cervical spine. Therefore, fastening a seat belt is an important condition for airbags to play a protective role.

The structure of the airstool system: The main electronic components that constitute the airbag system include ECU, collision sensor, warning device, airbag assembly, occupant position sensing device, connector and wiring harness.

The typical ECU structure of the airbag system is a centralized airbag ECU with single-point collision sensing, and an electronic accelerometer associated with an amplification and filtering circuit is used to stably track the acceleration of the vehicle.

Charge pumps have the ability to increase the energy reserve voltage above the operating voltage of the car. In the event of a crude lead failure in the battery, charging system or generator, the charge pump maintains the minimum operating voltage of the energy storage device.

One of China's four great inventions, explosives, was adopted. At the moment of collision. Induce ** medicine, produce gas,

An automobile airbag device is a device that inflates the airbag to protect the occupants before a secondary collision occurs in the event of a crash. An airbag is an auxiliary device, which is an occupant restraint device for seat belts. There is also a story about its invention, which is said to have been invented in 1952 by American engineer John because he was inspired by a serious traffic accident and began to research the invention of automobile airbags.

First of all, when the car collides, the relevant collision signal is detected by the collision sensor, such as setting an acceleration sensor to detect the change of acceleration, and the relevant control system will judge whether to turn on the inflation device, because the impact process is very short, the airbag is required to complete the inflation from triggering to the completion of the inflation is very short, about 25-35 milliseconds.

The process of inflation involves the following chemical reactions: 2Nan3 2Na3N2, which produces 50 to 90 liters of nitrogen, which quickly fills the air sac, nitrogen is not toxic, the content in the air is 78%, it is an ideal filling gas. In addition, there is a small amount of iron oxide in the air bag, and the function of iron oxide is to remove the metal sodium, and the generated metal sodium is chemically active, and it is a great hidden danger to exist in the air bag, so it is removed with iron oxide.

**Conditions and principles: The collision sensor needs to receive the signal of the external force, and after reaching the dangerous level, the airbag computer module processes the signal and sends the current to each airbag device (for example, many cars are now only bursting the airbag on the side of the impact, or the left, or the right, all of which belong to the computer module control).

The airbag explodes in less than a second, and the principle is that the airbag computer module transmits the current to detonate the airbag. The structure of the airbag: the ignition, the explosive that produces the gas, the steel wire mesh that filters the gas, the steel shell of the airbag generator.

At present, China's technology for making its own airbags is very mature, and most of them are directly exported.

When the car collides, the control system of the airbag detects that the impact force exceeds the predetermined value, and it will immediately connect the squib circuit in the charging element to ignite the gunpowder powder and the gas generator, and inflate the airbag in seconds, causing the airbag to inflate and explode sharply.

See more coarse shouts.

Its main purpose is that the car can effectively reduce the number of people in the car after a violent collision.