1. Introduction
The airbag
automotive airbag system, referred to as SRS ( SupplementalInflatableRestraintSystem ). Refers to the soft inflatable bag installed in the car, using the vehicle at the moment of collision accident occurred pop-up, in order to achieve the role of a buffer to protect the safety of drivers and passengers. To be used in conjunction with balloon absolute both seat belts, to get protective effect.
In general, when a collision encountered avoid vehicle occupant head and body, a direct hit to the interior of the vehicle, reduce the degree of injury to persons. According to National Highway Traffic Safety Administration survey, the use of air bags was the moment to make car driving mortality decreased by 11 percentage, the positive impact is reduced by 30 percent strength. While airbags can not fully protect the safety of the crew, there may even be harmful, it sparked off a lot of blame, but still there is no denying its protection when properly used.
Today, most countries airbag has been one of passive vehicle safety device is essential provisions.
2. History
The airbag
since
In 1952, the American engineer JohnW.Hetrick, because inspired by a traffic accident, prompting research work. August 18, 1953, made the United States Supplemental Restraint System (SupplementaryRestraintSystem) patents.
1971 Ford airbag installed in a number of experimental car, 1974 General Motors took the lead in commercial vehicles fitted with seat safetyBalloon, after the front passenger seat is also fitted with airbags, and to follow the impact strength are two inflatable models, but the former Chrysler chairman Lee middot; Iacocca (LeeIacocca) said in his autobiography, customers just want to 1970s to a large body of high-powered cars, for safety features not interested belt usage is very low, so the airbag did not take long to disappear from the market.
in December 1980, Mercedes-Benz S-Series to become the first car equipped with air bags in the car officially sold in Europe. 1988 Chrysler began its all cars are fitted with airbags and airbag demonstration masterpiece television advertising effectiveness, safety really turned the automotive world with competition.
In 1984, the National Highway Traffic Safety Administration to develop “Federal Motor Vehicle Safety Standards” (FederalMotorVehicleSafetyStandard; FMVSS) Article 208, the increase requires the installation of an air bag. In 1995, the US Congress passed a bill through the official to provide clear guidance and direction of the law, requiring 1995 new car comes standard with dual airbags need. Since 1997, the truck also apply mutatis mutandis.
3, actuation principle
when the impact sensor of impact is detected, the relevant control system determines the crash extent determine whether to trigger the inflator, generally gasoline or explosive a gas generating agent and other composition inflator squib module. In order to secure the waste processing temperature usually only deploying the air bag.
due to the impact process time is very short, typically triggered by the airbag to inflate the course of about 25-35 milliseconds. Inflatable too long it will lose its effectiveness.
4, the type
airbags
So far, the balloon after several decades of development, has evolved a variety of different forms . Based on the placing ofPositions can be distinguished:
in front of the airbag
Driving airbag (DriverFrontAirbag; DA)
passenger airbag (PassengerFrontAirbag; PA)
side airbag
side front airbag (FrontSideAirbag; FSA) [?? 123] rear seat side airbag (RearSideAirbag; RSA)?
side of the air curtain
The knee airbag
5, the main device
1?. impact Sensor
2. The electronic processor
3. inflator
4. airbag
6, the inflatable device
[ there sodium azide (of NaN3) or ammonium nitrate (of NH4NO3) and other substances into the airbag 123]
car. When subjected to crashing car at high speeds, these substances decomposition reaction occurs rapidly, a large amount of gas, the airbag is filled. (Sodium azide decomposition of nitrogen and solid sodium; large amount of ammonium nitrate decomposition of nitrous oxide (N2O) gas, and water vapor.)
7, defects
[ 123] the airbag latest ideas
in some proof of actual collision airbag does have reduced the effectiveness of passenger casualties, but also found some problems among its existence. Airbag present problems in use are:
1, the air bag may be opened when the vehicle speed is low. In the car the car is very lowWhen the traveling speed collision accident occurs, the driver and passenger to wear seat belts, airbags deployed completely without protection. But if the time to deploy the airbag can cause unnecessary waste and may even aggravate collision damage caused by deployment of the airbag.
2, the passenger airbag will start causing damage. The airbag system start impulse to open the airbag cover, and is inflated to expand at the moment, is likely to impact on the occupant; hot gas produced and also burns the occupant of the driver.
3, when the passenger seat or no deviation or a child riding on the seat, the airbag system started not only would not achieve proper protection, but also may cause some harm to the crew.
8, how to use the
driver’s seat should try to move backward, so that there is enough space for the airbag to fully play its protective role in the expansion after the accident occurred. The driver control the car in front should not be poured, sitting to the right and close to the seat-back chairs, and wear seat belts. Children must be 12 years of age sitting in the back of the car, and wear seat belts. Weighing less than 18 kg baby should be placed with a child seat device immature children rear seat, and seat belt buckle.
9, the use of attention
General airbags are 8–10-year period, the airbag malfunction indicator light or on the dashboard just in everyday driving It fails to light, as evidenced by the airbag in a normal operation state. But this does not mean that it, in the course we should also note the following:
First of all, whenever we should not go beating or striking parts of the airbag is located. Should not go directly to water washing bag position, because the damp air bag at a critical moment can not protect your life.
is then seated. In general the driver should not lean forward while driving, sitting to close to the seat-back chairs should be adjusted to comfortably control the car as well, so willThere is enough space for the air bag fully play its role in the protection after the accident.
For a vehicle driving position also has airbags, never let children sit in the front row or placement of a child seat in this position unless manually turned off the airbag in this position, would make the child when an airbag igniter cause great harm.
Finally, everyone is worth noting that, if the situation is not wearing a seatbelt, the airbag will not be able to protect the crew, the crew will have a serious injury, because the airbag is very explosive amazing enough to hit the driver. The use of car passengers should wear seatbelts, or it may cause the passenger airbag system may lead to more serious injury when the accident happened.
10, calling for the airbag industry standard
when the accident occurred under normal circumstances, the car driver’s airbag can give some protection. Therefore, many consumers in the purchase of cars, airbags will be placed in an important position. However, the car after the accident impact airbags also appeared in cases of failure to pop.
Therefore, Beijing Beichen Asian Games Village Automobile Exchange Market Center Yan Jinghui, vice president pointed out that in any case the airbag should be detected, or there is a clear impact standards. China Automobile Industry Association Du Fangci adviser also believes that commissioned the relevant departments detection technology, the key to resolving the matter. Meanwhile, the Beijing Olympic lawyer law firm Leihai Jiang also called for, given that many car accident car airbag can not be opened injury and the negative impact brought about by the imminent introduction of airbags national standard, the standard settings for the impact force is particularly important.
# 9642; safety system
[ 123] # 9642; SRS
# 9642; exterior
2 airbag apparatus
3 acting
4 principle
5 distribution effect
# 9642; airbag
# 9642; quantity
# 9642; new products
# 9642; application
# 9642; structure
# 9642; sensor
6 use
# 9642; open
# 9642; shelf life
7 Events [ 123]
1 Introduction airbags
as a vehicle airbag passive safety auxiliary configuration, increasing attention has been paid. When the automobile collides with an obstacle, is called a collision, the occupant collides with the interior member, known as a secondary collision, the airbag in a collision, a cushion filled with gas quickly opened before the secondary collision, the occupant due to inertia ldquo move; flutter in the air cushion rdquo; thereby mitigating the impact by the occupant and absorb impact energy, reduce the degree of harm occupants.
Distribution of the airbag in the vehicle forward (passenger seat), the side (vehicle front and rear) and the roof three directions. Outside the vessel equipped with the airbag system are printed SupplementalInflatableRestraintSystem, abbreviated words SRS), and directly translated into Chinese, should ldquo; auxiliary inflatable restraint system rdquo ;. It aims to reduce vehicle after the collision, the occupant due to the inertia of the degree of injury during a secondary collision.
balloon (airsac) is a bird’s respiratory system. Respiratory system of birds is very specialized, and in the veryLung and advanced airbag system communicating pipe. A single layer mainly composed of the airbag squamous cell, small amount of connective tissue and blood vessels, which lacks functional gas exchange. Birds generally airbag 9, wherein communicating the bronchus balloon after (thoracic and abdominal bladder balloon), and abdominal bronchial communication of a front airbag (bladder neck, chest and the airbag between the airbag lock); In addition to the lock outside the room as a single airbag, are in paired right and left. Airbags throughout the internal organs, between the chest and has a bone cavity extending into large branches.
bird airbag widely distributed in organs, some movement between the bone cavity and the muscles. The presence of the airbag, so that the birds produce a unique breathing mdash; mdash; double respiration (dualrespiration), which differ significantly in oxygen and other terrestrial vertebrates only during inhalation. The special structure of the respiratory system of birds is necessary for life and flying high oxygen consumption to adapt. Airbag apparatus is to ensure adequate supply of oxygen bird during flight. Birds in the sojourn, mainly by the sternum and rib motion to change the volume of the chest, lungs and cause the air bag to expand and shrink to complete the gas metabolism. When flying, sternum as a starting point the fan wing muscles (pectoralis major and pectoralis minor muscle), and stabilized, and thus depends mainly on stretching the balloon to assist in the completion of the lungs breathing. When Yang wing balloon dilation, air is drawn through the lungs; Blade airbag when compressed air is discharged again through the lungs. Thus the birds fly faster, the fan wings more intense, the faster gas exchange, thus ensuring an adequate supply of oxygen.
difference
Automotive
Distribution of the airbag in the vehicle forward (passenger seat), the front and rear vehicle discharge side and the roof three directions. SupplementalInflatableRestraintSystem words referred SRS) are printed in a vessel equipped ,, Chinese transliteration airbag system, should ldquo; auxiliary inflatable restraint system rdquo ;. It aims to reduce vehicle after the collision, the occupant due to the inertia of the degree of injury during a secondary collision.
Birds
balloon (airsac) is a bird’s respiratory system. Respiratory system of birds is very specialized, and in theHaving a well-developed airbag system and a lung communicating pipe. A single layer mainly composed of the airbag squamous cell, small amount of connective tissue and blood vessels, which lacks functional gas exchange. Birds generally airbag 9, wherein communicating the bronchus balloon after (thoracic and abdominal bladder balloon), and abdominal bronchial communication of a front airbag (bladder neck, chest and the airbag between the airbag lock); In addition to the lock between a single airbag outside, are in the left and right pair. Airbags throughout the internal organs, between the chest and has a bone cavity extending into large branches.
Distribution
bird airbag widely distributed in organs, some movement between the bone cavity and the muscles. The presence of the airbag, so that the birds produce a unique breathing mdash; mdash; double respiration (dualrespiration), which differ significantly in oxygen and other terrestrial vertebrates only during inhalation. The special structure of the respiratory system of birds is necessary for life and flying high oxygen consumption to adapt. Airbag apparatus is to ensure adequate supply of oxygen bird during flight. Birds in the sojourn, mainly by the sternum and rib motion to change the volume of the chest, lungs and cause the air bag to expand and shrink to complete the gas metabolism. When flying, sternum as a starting point the fan wing muscles (pectoralis major and pectoralis minor muscle), and stabilized, and thus depends mainly on stretching the balloon to assist in the completion of the lungs breathing. When Yang wing balloon dilation, air is drawn through the lungs; Blade airbag when compressed air is discharged again through the lungs. Thus the birds fly faster, the fan wings more intense, the faster gas exchange, thus ensuring an adequate supply of oxygen.
prototype
The airbag of the present invention from a witness to the accident.
In 1952, the American engineer Hetrick in a car, in order to avoid an obstacle, immediately play the steering wheel and emergency braking. At the same time, he and his wife are instinctively stretched out his arm to protect was being on the front row center seats daughter. While near misses, the self-taught engineer, but be inspired. He wanted there must be a protection device during emergency braking or a collision can replace the arm to protect the occupants of the pediment. Two weeks he used to design an automobile energy absorbing means, which in principle is filled with a hood download compressed air reservoir, whenA frontal collision of the automobile, an impact force causes an inertial weight slidably moves forward, so as to promote rapid inflation accumulator to the wheel center and the hidden side of the instrument panel air bladder, so that the vehicle can harm reduction.
August 18, 1953, Hetrick won the National Patent Office issued ldquo; cushion car safety devices rdquo; patent certificate, which is the prototype of the airbag.
Security systems
is to protect the safety of the passenger when the vehicle was side impact and rollover is usually installed on the vehicle door, was at the side of the vehicle collision can cause serious deformation of the door, from the waist due to side impact, the abdomen, the chest outside and arm injuries, ensure mobility and ability to escape the body of the upper limbs.
With the popularity of passive vehicle safety significance, there have been a few up to 30 airbags in some high-end luxury cars and neck, knee, or even two in the roof with two tubular side airbag will, when the accident occurs can effectively relieve the pressure from the upper roof, with a side air curtain can effectively protect the occupant’s neck and head. Knee airbag front portion is located in the driver’s seat, once opened can effectively protect the extremity of the rear passenger waist, thus can alleviate the forward momentum from the frontal collision.
SRS
The SRS is referred to as secondary safety system, which usually occurs as an auxiliary safety seat belt apparatus. Seat belts and airbags are supporting the use of no safety belts, airbags effect will be greatly reduced. According to the survey, the airbag can be used alone accident mortality percentage of approximately 18, the belt can be used alone accident mortality percentage of approximately 42, and can reduce the fatality rate when the airbag with seat belt use about 47 percentage . Thus, only the two complement each other to the greatest possible reduction in mortality in the accident, the airbag system will inevitably occur as a secondary seat belt system.
When a collision occurs, the seat belt occupant ldquo; restraint rdquo; on the seat, the occupant’s body will not hit the steering wheel, instrumentThe windshield plate, to avoid the occurrence of a secondary collision of the occupant; while avoiding the occurrence of the vehicle occupant being thrown out under the seat rollover dangerous situation. Airbag protection principle is: When the car suffered some impact strength, air bag systems will lead to a sort of small doses of explosive chemical reactions, hidden in the car’s air bag inflated just pop in an instant, in the occupant’s body and the car played within the device before the collision bedding, and mitigate the impact suffered by the body, so as to mitigate the effect of occupant injury.
the SRS airbag system is called, with respect to the seat belt, the airbag is only a secondary protective device. Special fabric made of nylon airbag is lined with rubber, filled with helium gas harmless work. This system is activated by a sensor, a sensor for monitoring the speed of the vehicle collision minus a small degree Swift airbag. In the early collision, the airbag begins to inflate, inflatable safety takes about 0.03 seconds. The airbag inflator can be very fast very important, which can ensure that when the passenger’s body is bound by the seat belt does not move while the head is still moved forward, airbags in place in time. Encountered in the head airbag, the airbag through the vent flatus surface of the balloon. Exhaust gases have a certain rate, to ensure that people’s body parts slowly slow down. Since the airbag inflated bounce speeds up to 320 km / h, a collision if the person riding position is not correct, it will bring serious injury. Outside the outer
vehicle
car bumper airbag system called concealed airbag. When the car in front of a pedestrian collision, the airbag rapidly forward and to both sides of the lift open, to hold up pedestrians knocked down a pedestrian while preventing both sides. Exterior air bag system is in development stage.
2 airbag apparatus
As an auxiliary passive safety body configuration, increasing attention has been paid. When the automobile collides with an obstacle, is called a collision, the occupant collides with the interior member, known as a secondary collision, the airbag in a collision, a cushion filled with gas quickly opened before the secondary collision, the occupant due to inertia ldquo move; flutter in the air cushion rdquo; thereby mitigating the impact by the occupant and absorb impact energy, reduce the degree of occupant injury.
3 action
The airbag is a striking high-tech devices on modern cars. Install a car steering wheel airbag device, usually there is no difference with ordinary steering wheel, but once the car front end collision occurred a strong, airbag from the steering wheel will instantly ldquo; jump rdquo; out of cushion between the steering wheel and driver , to prevent the driver’s head and chest impacts the steering wheel or dashboard to other hard objects. Since airbags available, it has saved many lives. Studies have shown that frontal air bag device car crash, the driver of mortality, big cars reduced by 30 percentage midsize sedan by 11 percentage, the percentage of small cars reduced 14.
4 Principle
The main airbag by the sensor, a microprocessor, an airbag gas generator and the other components. Crash sensor and a microprocessor for determining the degree of transmission and the transmission signal; a gas generator based on a signal indicating an ignition operation, the solid fuel ignites to generate gas to inflate the airbag and the airbag is rapidly inflated balloon capacity is about (50-90) L . The air bag is provided with a safety valve, when inflated excess intraluminal pressure exceeds a certain value or automatically bleed part of the gas, to avoid injury to the passenger pressing. Airbag used mostly nitrogen gas or carbon monoxide.
In addition to the driver’s side airbag, but also some cars front passenger airbag installed (i.e., dual airbags standard), drivers and passengers with similar , but the volume of the airbag to be bigger, the desired gas is also just a little more. In addition, some cars are still seats side by side door mounted side airbags.
5 distribution effect
The airbag
The airbag Distribution in the vehicle forward (passenger seat), the side (vehicle front and rear) and the roof three directions. In the external airbag system equipped with containers are printed with SupplementalInflatableRestraintSystem, referred to as SRS) message, directly translated into Chinese, should ldquo; auxiliary inflatable restraint system rdquo ;. English name emphasized the airbags are auxiliary equipment, seat belts should cooperate in order to play the best protection. Unfortunately, the Chinese name omitted from this misunderstanding is easy to bring to the user, that alone airbag can get a good protective effect. In fact, if not with the seat belt used, in some cases, it will cause unnecessary harm the occupant when the airbag deploys. Was driving at an intermediate position of the airbag mounted in the steering wheel position, co-pilot’s airbag installed inside the front of the platform, at the moment of the accident can effectively protect the driver and front passenger seat occupant’s head and chest, as violent frontal collision would lead to a substantial deformation front of the vehicle, and the vehicle occupants will dive forward with this stock violent inertia, causing the car with members of another crash, another car was driving airbags can effectively position in the event of a collision to prevent the top of the steering wheel to the driver’s chest, to avoid fatal injuries.
side airbag system to protect occupants when the vehicle was safe side impact and rollover is usually installed on the vehicle door, a vehicle collision can cause side door was badly disfigured that it can not open the door, the car occupants are trapped in the car, side airbags can effectively protect car occupants from side impacts caused by the waist, abdomen, chest outside, and arm injuries, ensure mobility and ability to escape the body of the upper limbs.
number
With the popularity of passive vehicle safety significance, there have been several balloon as high as 30 in some high-end luxury car from the neck, knee, or even on both sides of the roof will be equipped with two tubular balloon, under pressure from the upper roof can be effectively alleviated, with side air curtain can effectively protect the occupant’s neck and head. Located in the front part of the knee airbag driver’s seat, the rear waist body portion can effectively protect passengers, the forward momentum from the mitigation of a frontal collision. Outer
New
car bumper airbag system called concealed airbag. When the car in front of a pedestrian collision, the airbag rapidly forward and to both sides of the lift open, to hold up pedestrians knocked down a pedestrian while preventing theBoth sides of the exterior of the airbag system is in development stage.
Applications
The main airbag used in papermaking machinery industry, a corrector, a calender, a press, a plurality of blade portions, like net stroke adjustment unit and tension control, as lifting elements lift the airbag apparatus, to overcome the shortcomings of conventional lifting devices, without the need for maintenance, long life, easy replacement operation.
In the mechanical isolation, the balloon is generally used capsule, film and the band structure. Airbag apparatus can be used in various mechanical vibration absorbing a buffer, to control movement or supercharging. Compared with the elastic member having the same function as spring steel, an airbag having a simple structure, reliable, does not require complicated calculations and design parameters, no static deflection, easy maintenance, and long life.
In practice, a variety of airbag intended use, such as vibration damping, shock, lifting, clamping, and anti-swing, etc., and its use amount may be used depending on the particular device. But there is a common characteristic can not be neglected, i.e. should be equipped with sufficient air to maintain a stable source of its internal pressure.
Structure
The airbag system consists of a sensor, the gas generator igniter, and the airbag control unit (ECU) and so on.
Sensor
days detection sensor is judged when the impact signal of vehicle collision, the airbag so that timely point explosion. Sensor according to their functions can be divided into two kinds of impact sensors and safety sensors. Crash sensor is responsible for detecting the intensity of the collision, if the vehicle speed at 40KM / H hit the head of a non-deformable fixed obstacle, an impact sensor that may operate, turns Ground loop; safety sensor, which is closed to the deceleration slightly smaller, play a role as insurance, to prevent short circuit caused by the collision sensor error open expansion.
sensor structure can be divided according to their mechanical, electromechanical and electronic three kinds. The following mechanical sensors (crash sensor eccentric weight type) as an example of the working principle of the sensor.
Usually a mechanical sensor installed between the bumper and the fenders for a low-speed collision sensing signal. When the sensor is mounted in a sealed shock protection box, the structure shown in Figure, when the moving speed of the hammer sensor above a certain vehicle speed (referred to as TBD vehicle speed), the mechanical energy of the weight put directly to initiator so that the air bag deployment opening.
Specific working principle: when normal driving automobiles, heavy torsion spring 2 3, the movable contact 6,12,14 set at the top dead center position, the trigger signal to the sensor is not ECU. When automobile collision, the inertial force generated by the deceleration of the hammer against the torsion spring to produce movement of the contact bridge 5 rotates to drive the dynamic and static contact binding. In this case, the sensor sends a signal to the ECU connected Tongliao, but also security sensors turned on, ECU detonate command issued.
of the gas generating
known as the inflator gas generator, when the igniter for igniting agent detonation, generates gas to inflate the airbag, so that balloon-expandable open. The gas generator special fixing bolts and nuts on the airbag holder can be assembled with a special tool assembly. The gas generator is covered by an upper cover, lower, inflatable and metal filter screen. The cover has a plurality of gas-filled pores, due diligence inflatable circular, with rectangular holes and two kinds. The cover has mounting holes for mounting the gas generator to the airbag holder. The upper cover and lower cover fitted integrally with a cold process, the inflator housing interior agents, filters and plummet. Metal screen placed on the inner surface of the gas generator, slag particles to filter the inflator after ignition and combustion agent.
Most of the gas generator are produced using a thermal efficiency of the reaction nitrogen gas into the airbag. In the instant igniter to detonate igniter, an ignition agent will produce a lot of heat, the thermal decomposition of sodium azide immediate release nitrogen and holes from the inflator into the airbag.
igniter
igniter outer foil, mounted in a central position inside the gas generator. And detonated explosives igniter lead including drugs, lead wire and the balloon connector plug connector, the connector provided with shorting. When the connector plug or unplug the connector is not fully engaged, the short-circuit piece will short the two lead wires, or misleading prevent static electrical heating wire circuit is turned on by mistake caused by expansion of the airbag opening.
When the ignition command issued ECU, electric wire circuit connected to the heating wire quickly red hot bleedBust drug, explosive detonated instantaneously generates heat, a sharp increase in temperature and pressure within the cartridge and the cartridge to break the inflator into the airbag heating explain.
As described above, according to the arrangement position of the air bag can be divided into a driver side airbag, a passenger side air bags, rear airbags, side airbags and other airbag and a top; protected can be divided by size day entire stopper body type balloon and the main face of the protective armor small airbag. Surface protection airbag lower cost, but it must be used in conjunction with the seat belt and have protective effect. Due to the widespread use of European car safety belt, so more than a small European car airbags. US auto safety belt is not used for the design, the use of open-type balloon.
used earlier airbag nylon fabric coated with polychloroprene made of. In addition to the base material outside the balloon unchanged, there are two basic design concepts. One conventional airbag manufactures coated fabric, which is controlled by changing the size of the buffer the size of the airway; the other is not coated with a fabric having a certain air permeability, cushioning properties which controls, but its air permeability, there are strict requirements. Use of the former is more, most of the good properties of crack polyamide fabric, which is coated with neoprene ethylene.
ECU
ECU mainly by SRS logic module, a signal processing circuit, backup power circuit, the protection circuit and a voltage regulator circuit, generally SRSECU safety sensor is fabricated with the SRS control assembly.
(1) SRS logic module. SRS logic module is mainly used for monitoring longitudinal vehicle deceleration or inertia force value reaches the temple, the control point assembly airbag will deploy igniter. In the vehicle is in motion, before the ECU constantly receive a collision sensor and a vehicle speed change signal coming safing sensor, after mathematical calculation and logical decision, is determined whether a collision occurred. When the judgment result is a collision, the ignition control software program to run immediately, issue a fire command to detonate igniter and an ignition circuit which generates a lot of heat when the igniter to detonate the inflator gas to thermal decomposition to release SRS inflator.
(2) The signal processing circuit. The signal processing circuit is mainly composed of an amplifier and a filter for organic chemistry stall sensor signal shaping, amplifying andFilter, so that ECU can receive, identify and process.
(3) protection circuit and a voltage regulator circuit. In order to prevent the airbag system components suffer damage, ECU protection circuit must be set. Meanwhile, in order to ensure the supply voltage when the vehicle, the airbag system to work properly, must also set the regulator circuit.
SRS
SRS warning lamp on the instrument panel when, the ignition switch is turned on, the system self-test diagnostic unit, if the SRS warning lamp is lit off 6s the system is normal, if still blinking after 6s or long-off, the air bag system failure, suggesting that maintenance should be carried. If abnormal ECU, SRS warning lamp can not control, SRS warning light will make abnormal display under the direct control of other circuits.
using 6
(1) only an auxiliary airbag safety system, to be used in conjunction with a seat belt. Design airbag mind is assisted under the action of the seat belt to protect the safety of the occupants, but we often easy to separate the view airbags and seat belts that have airbags, seat belts are not big, so there have been cases when a frontal collision occurs, not wearing a seat belt and was injured by the airbag. Since the inflated airbag speed is very fast, inflatable impact is also a great moment, if you do not wear a seat belt, occupants will be due to the huge inertia and not rushed prematurely inflated airbag, then it will happen unexpected accident, the airbag but played a negative role. Therefore, when driving the car and ride with a front air bag, be sure to wear seat belts, if a frontal collision, the seat belt to add dual protection airbags are adequately protected in order to be fully realized.
(2) When the vehicle is equipped with front passenger airbags, must not allow the child sitting in front of or placement of the child seat in this position, if this position can be manually closed airbag, you should turn off the airbag in this position of children traveling scabies. Since the outbreak of deer airbag will hurt certain degree, lamb chops passenger airbag which is larger, its explosive force children Tong Suocheng is intolerable.
(3) To observe, the airbag is located on the dashboard warning light. Under normal circumstances, the ignition switch ldquo; ACCrdquo; or ldquo; ONrdquo; rear position, a warning light will shine about 6s, extinguished self-test, if the length of the warning light off, the airbag system failure, should be repaired . Otherwise, there may be cases balloon does not work or error pop-up appears.
(4) must be replaced airbag exploded, care must be taken when installing a new air bag, an impact sensor mounted to the board in the computer with the computer board replacement, computer board mounted in the outer also be replaced individually, or easy to detonate; since the airbag is used with the belt, the belt tensioner tensioning device must be replaced.
(5) can not be suspended windscreen trinkets and small pendant, or at the time of airbag deployment, by hanging ornaments sudden collision, will produce violently, like a bullet fired occupant, The consequences could be disastrous.
(6) can not beat identification portion exposed outside of the airbag, the airbag contains as the chemical composition is easy for the electrical detonation, such as hammering certain force, it can easily be detonated .
(7) Since the bounce occurs abruptly when the airbag inflates, a great impact force at this time, if you do not wear a seat belt correctly, sit close to the air bag or too near the impact force when the air bag inflates ten million people will have the same injury. Therefore, to maintain a distance between the daytime and the driver’s steering wheel is greater than 10cm, and try to move the seat rearward.
(8) Do not place between the passenger and the air bag hard or sharp objects, otherwise, the strong impact of the air bag when they will explode the same pressure to humans, causing casualties.
(9) of the driver wearing glasses is best to wear safety glasses, because the airbag would hit the glass glasses crashed, causing eye and facial injuries.
Open
In order to ensure airbag deployment when appropriate, automobile manufacturers have specified initiation conditions the balloon, only to meet these conditions, the air bagIt will explode. Although in some traffic accident, vehicle occupants crashing, or even life-threatening, vehicles approaching retirement, but if conditions are less than the explosion of the airbag, the airbag is not open.
requires proper airbag deployment speed and impact angle. In theory, only the left front of the vehicle is about 60deg; impinges on a position between the fixed object, faster than 30KM / h, it may open the airbag case. Speed is not what we are talking about here understood in the usual sense of speed, but the speed of the vehicle in the laboratory relatively rigid fixed barrier collision, the actual collision speed of the car is higher than the speed test balloon to open.
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