What are the components of an airbag? What does an airbag system consist of?

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. When a car has a frontal collision accident, when the airbag control system detects that the impact force (vehicle deceleration) exceeds the set value by the collision sensor, the airbag computer immediately turns on the electric squib circuit in the inflatable element, ignites the ignition medium in the electric squib, and the flame ignites the ignition powder and the gas generator, produces a large amount of gas, inflates the airbag just in it, makes the airbag expand sharply, breaks through the decorative cover plate on the steering wheel and drums to the driver, makes the driver's head and chest press on the airbag that is full of gas, buffers the opposite driving The impact of the driver and then the gas in the airbag is released.

There is nitrogen in it.

Analysis: Car airbags are generally filled with nitrogen, this is because the chemical properties of nitrogen are very stable, not suitable for **, not easy to burn, and small changes at high and low temperatures, which means that once a car has an accident, especially **, **, nitrogen will not be affected and further harm the people in the car.

In addition, among the chemically stable gases, nitrogen is the cheapest, most convenient and most extensive, and is very suitable for large-scale industrial applications. The inflatable soft bag installed on the car is used to pop out at the moment of the vehicle collision, so as to achieve the role of cushioning and protect the safety of the driver and passengers. Generally speaking, in the event of a collision, the head and body of the passenger can be avoided and directly hit the interior of the vehicle, reducing the degree of personal injury.

1. The function of automobile four-wheel alignment is:

It is conducive to the car to maintain a stable straight line and light steering, and reduce the wear and tear of tires and steering parts during driving.

2. Under what circumstances do you need to do four-wheel alignment?

When driving the vehicle, you feel that the direction of the steering is heavy, shivering, misaligned, not homecoming, or you find that the tires are unilaterally worn, corrugated worn, block worn, eccentric wear and other abnormal wear and tear, as well as when driving, the car feels floating, trembling, swaying and other phenomena, you should do four-wheel alignment.

1) Tire pressure and tire tread wear: Uneven tire wear indicates a failure in certain aspects such as tires, steering or suspension. (There are many reasons why tires wear out irregularly and wear out too quickly.)

The most common reasons are improper inflation pressure, not regularly changing tires, improper driving habits, or incorrect alignment of the original four wheels. )

2) Wheel oscillation: Oscillation is a condition that causes unstable rotation of tires due to various reasons, and the oscillation of wheels and tires refers to irregular up-and-down or side-to-side movements. Left-right motion refers to the lateral oscillation of the wheel or tire, and up-down motion refers to the radial oscillation of the wheel or tire.

Vibration faults related to the oscillation can only be eliminated by looking for the ** of the oscillation.

3) Wheel deviation: Deviation refers to the deviation of the vehicle driving direction when the vehicle is driving on a straight road, and the steering wheel is not affected by any external force. Mistracking is usually caused by:

Tire structure (radial transverse force).

Improper fit or uneven wear of the tires.

Improper alignment of the front or rear wheels.

The steering valve is off-center.

Uneven brake adjustment or brake lag.

Airbag composition: airbag bag, igniter and inflator are composed.

An airbag system is a system that uses only seat belts to protect the driver and passengers in the event of a low-speed collision, without wasting airbags. In the event of a collision at a speed greater than 30 km/h, the seat belt and airbag will ,.. act at the same time

The airbag system is mainly composed of sensors, airbag components, airbag electrical energy, etc.

An automotive airbag system consists of a crash sensor, a control module (ECU), an inflator, and an airbag:1. Airbag Sensors:

It is also commonly referred to as a collision sensor. Depending on the application, collision sensors are divided into trigger collision sensors and protective collision sensors. The trigger collision sensor, also known as the collision intensity sensor, is used to detect the acceleration change during the collision and transmit the collision signal to the airbag computer as the trigger signal of the airbag computer; Collision sensors, also known as safety collision sensors, are connected in series with trigger collision sensors to prevent airbags from detonation.

2.Control Modules (ECUs): Collision protection sensors are typically assembled with airbag system ECUs, mostly mounted under the cockpit center console.

The ECU is the core component of the airbag system. 3.Gas Generator:

It is mainly used to generate a large amount of gas in a short period of time (about 30ms) and fill airbags. The gas produced must be harmless to the human body and the temperature must not be too high. At the same time, the gas generator is required to have high reliability and stability.

At present, gas generators mainly include compressed gas type, pyrotechnic type and mixed type. 4.Airbags:

It is generally made of polyethylene terephthalate fabric, which has good crack resistance. It is a semi-rigid polymer beam material that can withstand a lot of pressure. After vulcanization, the impact of airbag inflation is reduced.

In the event of a traffic accident, the airbag in the car can reduce the chance of injury to our head and also reduce the rate of facial injury, so the airbag is very important, let's understand what are the components of the airbag?

Typically, the main components of an airbag are the control module and the airbag, as well as the inflator and collision sensor. Airbag is a passive safety protection system, which is used together with seats and seat belts to provide effective anti-collision protection for passengers.

The sensor feels the degree of collision of the car, and sends the degree of feeling to the sensor, the controller receives the signal sent by the sensor and processes it, when it judges that the airbag should be opened, it will immediately send a signal and make the gas generator start, when the gas generator receives the signal, it will quickly fill the airbag with gas.

When the vehicle is involved in a traffic accident, the airbag can be quickly filled with gas in a short time, and the airbag will be inflated, so that the occupants in the car can avoid the impact caused by the positive collision, and after about 1s, the airbag will automatically retract, so it will not allow the passenger to hinder the movement of the passenger.

Airbags can be divided into 7 types according to the placement position, namely front airbags, driving airbags, passenger airbags, side airbags, front seat side airbags, rear seat side Sun airbags, and knee airbags.

Airbags can be divided into 3 types according to the number of airbags, which are single airbags, double airbags, and multiple airbags.

Airbags can be divided into three types according to their size: airbags that protect the whole body, large airbags that protect the entire upper body, and small airbags that protect the face.

Airbags can be divided into four types according to different protection objects, namely driver anti-collision airbags, front occupant anti-collision airbags, rear occupant anti-collision airbags, and side anti-collision airbags.

Airbag system, commonly known as SRS, is the abbreviation of SupplementRestraint System in English, which literally translates to auxiliary protection system. Since airbags are an important device for auxiliary protection systems, people use SRS as an airbag system. Airbags are an attractive new technological device in modern automobiles and are the recently developed passive safety devices.

It has a very obvious protective effect on the head and neck safety of drivers and passengers. Especially in frontal and side collisions, the protective effect is particularly obvious. In the event of a collision with a Si Xiao car, the airbag system is very effective in protecting the safety of the driver and passengers, and generally has a single airbag system or a dual airbag system with a steering wheel.

In the event of a collision between a vehicle equipped with dual airbags and a seatbelt pretensioner system, the airbags and seatbelt pretensioners act at the same time, regardless of vehicle speed. Therefore, the airbag is wasted in a low-speed collision, and the maintenance cost increases a lot. Automobile safety is divided into two types: active safety refers to the ability of the car to prevent accidents, and passive safety refers to the ability of the car to protect its occupants in the event of an accident.

Since many accidents are unavoidable, passive safety is also very important, and airbags, as a research achievement of passive safety, have been rapidly developed and popularized because of their ease of use, remarkable effect and low cost. In order to prevent passengers from being injured in accidents, safety equipment must be installed. At present, there are seat belts, anti-collision bodies, and auxiliary inflatable restraint systems (SRS).

Due to the remarkable effect of the use of airbags, modern cars are generally equipped with airbag systems on the steering wheel in front of the driver, some cars are also equipped with airbag systems at the upper end of the toolbox in front of the driver's passenger seat, and some cars are not equipped with front airbags, but also equipped with side airbags, which can be inflated in the event of a side impact to reduce damage in the event of a side impact. The steering wheel of a car with an airbag device is no different from a normal steering wheel under normal conditions. However, in the event of a strong collision, the airbag "pops out" of the steering wheel in an instant, acting as a cushion between the steering wheel and the driver, preventing the driver's head and chest from hitting hard objects such as the steering wheel or dashboard.

This amazing device has saved many lives since its inception. A U.S. research institute analyzed more than 7,000 automobile traffic accidents in the United States from 1985 to 1993, and found that the front of the car equipped with an airbag device crashed, and the driver fatality rate decreased by 30% for large cars, 11% for medium-sized cars, and 14% for small cars. Therefore, airbags are one of the indispensable and important safety elements in the production of modern automobiles.

The function of airbags is mainly to prevent injuries caused by collisions between car fluids such as car occupants and interior parts during a collision, and are usually used as auxiliary safety blind devices 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 of the parts in the car, when the human body touches the airbag, the airbag begins to exhaust through the air hole on the surface of the airbag, which plays a role in paving the way to reduce the impact force on the body, and finally achieves the effect of reducing the injury of the occupants.