How car airbags work

The airbag is composed of a folded airbag (mounted on the steering wheel), an inflator, an igniter, nitrogen solid particles and the corresponding wiring harness, in which the accelerometer that detects the intensity of the collision is integrated in the airbag controller.

Working process: When the collision occurs, the controller identifies and judges the intensity of the collision according to the acceleration signal sent by the sensor, and when the collision intensity reaches the design condition, the sensor that detonates the airbag quickly touches the igniter to detonate the nitrogen solid particles, forming a rapidly expanding air bag to cushion the impact force suffered by the front passengers, mainly protecting their heads from injury. Of course, there is no need to be nervous, the sensor automatically calculates the intensity of the collision and does not cause the airbag to detonate incorrectly due to improper driver manoeuvring, small obstacles or minor collisions.

Opening principle: A minor collision will not open the airbag.

Generally speaking, the effective collision range of the airbag is only within a certain angle of the front of the vehicle, and the rear collision, side collision, or flip will not cause the airbag to open. For example, the Santana 2000 upgraded version will only open the airbag when it is hit within 30 degrees of the left and right sides of the front of the body.

Necessary conditions for airbag opening:

a, the speed of the vehicle is generally more than 50 kilometers per hour, but the key factor is the acceleration at the time of the collision (in the national identification test, the instantaneous acceleration of the collision is about -40g;

b, frontal driving;

c. Collision object: rigid wall or obstacle;

e. The rigidity of the collision object: the effect of the vehicle hitting the wall at a speed of 50 kilometers per hour and hitting the sand pile is completely different, so 50 kilometers per hour is only a relative speed, and the airbag will automatically open only when the actual collision meets the conditions.

It should be emphasized that wearing a seatbelt is an important condition for airbags to play a protective role.

How car airbags work.

The airbag in the car is actually composed of an inflatable mechanism and an inflator generator, and the gas in the airbag will be triggered in the event of a collision and then form protection. Ejects while rapidly expanding and then touches the human body. And at this time, the airbag will become a large protective body, which is to protect the human body from directly hitting the car.

And in order to prevent the airbag from being blown up by the protruding gas, an exhaust port is generally left on the airbag, so that the excess gas can be discharged. It is to reduce the pressure inside the airbag and prevent the airbag from bursting. <>

Auxiliary equipment can feel the airbag from many traffic accidents, which is really helpful and can also provide you with very effective protection. However, airbags can only reduce the danger and are an auxiliary device, and it is necessary to follow the traffic rules in daily life to avoid accidents. When life or property is threatened, airbags can effectively protect themselves.

If it can be popularized, it will be quite good for security. <>

Airbags are unsafe, but some airbags are not safe, because when used alone, airbags are like a time bomb. When the vehicle is traveling at a speed of 60 km/h, if it encounters a sudden impact, the airbag will pop out very quickly, which will cause an impact. Moreover, if the driver or occupant does not fasten the seat belt, the airbag will cause this impact force to fall on the vulnerable parts of the passenger's body during the ejection process, and it will also cause very large injuries, and if it is serious, it will lose life.

There are also some airbags that cannot be triggered by the trigger point and cannot be deployed because of the quality, such as triggering. Some collisions, no matter how violent, fail to hit the trigger point of the airbag, so the final ability will not be able to eject, and it will also crash into other vehicles. At this time, the airbag is actually in a stuck state, so it must be checked in time during use.

The airbag of the car will be deployed in the event of a car accident or a violent impact, which can protect the safety of the driver and the passenger in the co-pilot.

In the event of a collision, the switch will be turned on, and then it will enter the working state, and the air bag will be ejected and become larger.

This is how it works by quickly ejecting in the driver's zone when the car is hit violently.

When the car collides with a certain intensity while driving, the sensor switch is activated, the control circuit starts to work, and then the circuit is detected to determine whether the collision really occurred. If the signal comes from both sensors at the same time, the gas stocking sac will be activated.

Since the car's generator and battery are usually located in vulnerable parts of the front of the car, the airbag's control system has its own power supply to ensure its function. After determining that the conditions of the airbag are correct, the control loop will send an electric current to the ignition resistant, which will then be immediately heated rapidly to ignite the contained sodium nitride propellant.

According to calculations, a conventional airbag must start working within seconds after a car crash, the ignition device is activated within seconds, high-pressure gas enters the airbag within seconds, the airbag expands outwards within seconds, and the airbag fully inflates within seconds. Only then will the driver hit the airbag. Passengers touch and press the airbag to achieve safety protection; Through the viscous damping effect of the gas, the forward energy of the occupants is absorbed and dissipated, and the overpressure gas in the airbag is discharged through the airbag vent without causing harm to the occupants.

Millions of car purchase subsidies.

The role of airbagsIn fact, airbags were first born in the United States, mainly to provide effective passive protection for drivers or members to avoid reducing head and face injuries when cars collide or cause traffic accidents. In fact, the technology of airbags, as early as 1953, has been patented by the United States, and has now been popularized to various cars and has become a standard configuration. <>

We can learn from this popular science, in fact, airbags are composed of two parts. One is the impact sensor, and the other is the anti-collision airbag. The impact sensor is when the vehicle is dismantled and collided, and when it reaches a certain strength, the airbag will automatically open, so as to protect the members from smashing their heads into the steering wheel during the impact process.

Of course, this is a passive protective device, and we should actively control some risks and avoid some risks, so that we can be in a safe state. <>

We can also go to some car sales places to learn about this airbag. For example, like this auto show, for example, like these 4S stores, we can go to them to have a certain understanding. For those car sales consultants, they will be very patient, very polite to explain to us the role of the airbag and its **, or what kind of quality is used, which manufacturer produces, what kind of guarantee and so on.

Because for those car sales consultants, if they want to sell a sleepy car, they must have an understanding of the various parts of the car, otherwise it will be difficult to convince the customer and it will appear that they are unprofessional. <>

In addition, we can also go to some auto parts stores to find out. Selling auto parts, they will also have an understanding of the auto parts, when we want to buy, they will also patiently explain to us the accessories, the role and configuration and so on.

If you want to know about the car's airbags, you can go to the repair shop to see the master for maintenance, and you can understand the structure of the car and the airbags.

Generally, cars are two airbags, that is, the main driver's steering wheel airbag, and the co-driver's dashboard airbag, high-end cars will increase knee airbags, seat airbags, and head side airbags, and safer cars will have 8 airbags and 12 airbags.

The main function of this airbag is to protect the safety of the driver of the car, and the airbag will be opened in the event of an accident. This airbag is basically now available in cars. The co-pilot airbag refers to the airbag of the co-pilot position of the car, the function of the airbag is to protect the co-pilot's passengers, the co-pilot airbag is very critical, because when the car has an accident, the co-pilot is the most dangerous, this car airbag must be configured, if there is no 10 million excitation do not choose.

You should go to the Internet to find relevant information, because there is a lot of knowledge about car airbags on the Internet.

As an auxiliary configuration for passive safety of the body, automobile airbags have attracted more and more attention. When the car collides with an obstacle, it is called a collision, and the occupant collides with the internal components of the car, which is called a secondary collision, and the airbag quickly opens an air cushion filled with gas after a collision and before the secondary collision, so that the occupant "pounces on the air cushion" when moving due to inertia, thereby alleviating the impact that the occupant receives and absorbing the collision energy, and reducing the degree of injury of the occupant.

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 from 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 inflator, and after the inflator receives the ignition signal, it quickly ignites and produces a large amount of gas to inflate the airbag.

The function of airbags is mainly to prevent injuries caused by collisions between occupants and interior components in the car during a car collision, and usually appear as an auxiliary safety device for seat belts, and the two work together. An airbag system is a passive safety (see Automotive Safety Performance) protection system that, in conjunction with seat belts, can provide effective collision protection for occupants. In the event of a car collision, airbags can reduce the rate of head injuries by 25 percent and the rate of facial injuries by about 80 percent.

The protection principle of the airbag is: when the car suffers a certain collision force, the airbag system will trigger a chemical reaction similar to a trace amount of explosives, the airbag hidden in the car is inflated and popped out in an instant, and the body of the occupant can be in place in time before the collision with the parts in the car, when the human body comes into contact with the airbag, the airbag begins to exhaust through the air hole on the surface of the airbag, which plays a role in paving, reduces the impact force on the body, and finally achieves the effect of reducing the injury of the occupants. An electronic control of safety airbag airbag system is a passive safety (see Automotive Safety Performance) protection system that works in conjunction with seat belts to provide effective crash protection for occupants.

In the event of a car collision, car airbags can reduce the rate of head injuries by 25% and the rate of facial injuries by about 80%.

First of all, the fabric we make for airbags generally has high tensile strength, and most of them are made of nylon.

Secondly, due to the different capacities of the airbags, in order to prevent gas leakage, a layer of sealing rubber is usually coated inside, and most of the gases used in the airbags are nitrogen.

Airbags can be divided into driver's seat airbags, passenger airbags, seat side airbags, head airbags, rear seat side airbags, seat belt airbags, knee airbags, and head airbags.

It is made of sturdy sheepskin. Soft and firm.

A car's airbag protects the driver's head in the event of danger.

Car airbags.

A device is a device that protects the occupants by inflating the airbag before a secondary collision occurs in the event of a crash. An airbag is an auxiliary device, which is a seat belt.

of occupant restraints. 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 accelerometer.

Detect the change in 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 be very short from triggering to complete inflation, about 25-35 milliseconds.

The process of aeration involves the following chemical reactions.

2nan3 2na 3n2 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 airbag.

The function of iron oxide is to remove sodium metal.

Elemental chemical properties of sodium metal generated.

Lively, the presence in the airbag is a big hidden danger, 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.