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【Concept】
Reduce the degree of occupant injury when involved in a collision , the occupant to avoid the occurrence of secondary collisions or other dangerous situations under tumble seat safety devices being thrown out of the vehicle occurs .
Chinese name : Airbags
Foreign Name : Supplemental Inflatable Restraint System
Short : SRS
Properties: Body passive safety auxiliary configuration
Role: reduce the degree of occupant injury
Invention Country: United States
Inventors : John W. Hetrick
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【Term works】
Cars with the process, the sensor system to control the transmission speed constantly changing ( or acceleration ) device information from the control unit ( central controller ) to analyze this information to determine if the measured acceleration, velocity , or other indicators of the amount of change exceeds a predetermined value ( that really happened collision ) , the ignition control device issuing a command or direct control of the sensor body fat to a gas generator ignition , an explosion occurred after the ignition reaction to produce N2 or compressed nitrogen released from the gas tank full impact airbags.
In contact with the airbag when the occupant by the airbag vent dampers absorb impact energy , achieve the purpose of protecting the occupants .
With sodium azide (NaN3) or ammonium nitrate (NH4NO3) and other substances in the vehicle airbag .
When the car has been severely hit at high speeds , these substances will quickly decompose , producing large amounts of gas , filled balloon .
[ Nitrogen gas generated by the decomposition of sodium azide and solid sodium ; produce large amounts of ammonium nitrate decomposition of nitrous oxide (N2O) gas, and steam ]
The new airbag inflated joined scalable or release pressure device to prevent damage produced a sudden burst of intense pressure points on the human head generated , particularly passengers not wearing seat belts at the time can lead to life-threatening.
Specific forms:
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1 [ grade point explosive devices ]
I.e., the explosion of the gas generator of two points , the first stage produces about 40% of the volume of gas is much lower than the maximum pressure generated on the human head moving buffer , a second stage the remaining point of explosion generated gas, and the maximum pressure .
Overall, the point of maximum pressure levels of less than single-stage explosion point explosion . This form , the pressure gradually increased.
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2 [ graded release pressure mode ]
Opened a hole or adjustable pressure relief hole , complete with pull-tab Tether into the gas pressure to open the top of the form or on computer-controlled pouch .
In this way , a starting pressure reaches the set limit, then the instantaneous release of pressure, in order to avoid excessive damage.
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【1 Press the protected object classification terminology 】
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1 [ front airbags ]
Driver airbag (Driver Front Airbag; DA), passenger airbag (Passenger Front Airbag; PA)
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2 [ side airbags ]
Front-seat side airbags (Front Side Airbag; FSA), rear-seat side airbags (Rear Side Airbag; RSA)
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3 [ side air curtains ]
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4 [ knee airbag ]
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【Category 2 by the number of terms】
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1 [ single airbags, dual airbags ]
Currently the number of airbags in the middle and low domestic production of standard cars are 1-2 , are generally in the position of the vehicle the driver and co-pilot , one each , to protect members of the front of the vehicle crashing occurs when the chest and effective protection of the brain.
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2 [ four airbags ]
In some mid-range B-class car, usually equipped with four airbags in addition to two in the driver , co-pilot , in which the side door is also equipped with two .
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3 [ multi airbags ]
In some high-end cars like security known to Sweden 's Volvo cars in its flagship models of the entire vehicle is equipped with a six airbags and air curtains 18 , respectively, are located inside the front passenger seat , front and rear doors on each side of two , 18 gas distribution around the windshield curtain , side window Department of impact from all directions to provide the most effective protection.
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【3 by innovative classification terminology】
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1 [ inflatable seat belt ]
Anti- car rally casualties airbag seat belts, airbags , formerly known as the anti- car rally casualties seat belt , seat belt , also known as airbags .
In the car seat belt shoulder and overall with Peugeot -shaped balloon device . The seat belt combines the features of traditional seat belts and airbags provide passengers with a higher level of crash safety protection.
This technology reduces the damage to the passenger's head , neck and chest when the accident occurred , using a balloon-type seat belts, to further enhance the vehicle 's safety innovations facilities , while the elderly are a boon for children .
The inflatable seat belt , when it comes to unforeseen circumstances, the seat belt will instantly inflate like a balloon , which ease the impact of the effect is five times that of traditional seat belts ;
First, a large area can effectively reduce the shaking of the head and neck ,
Second, the air bag inflates with certain reaction , passengers can reduce accident prone rib fractures , internal organ damage and bruises and other phenomena, to achieve more than 60% at present to avoid casualties due to injury of the cervical spine balloon bombs .
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2 [ side airbags ]
Side airbags are mounted on the outside of the seat , the purpose is to slow down the damage caused by side impact . Many car manufacturers are now standard front two seats side airbags, rear side airbags and assembly models rarely .
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3 [ knee airbag ]
Most models are equipped with only the main , co-pilot airbags, side airbags , etc. In fact, in a real vehicle frontal collision , the following should be protected from the center console below the knee and the shortest is the most vulnerable fractures caused by injury.
Knee airbags are used to reduce the occupant in a secondary collision car interior occupant knee injury. Knee airbag is located in the front part of the driver's seat , once opened can effectively protect the waist under the rear passenger body parts , which can also ease the momentum before the collision from the front .
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4 [ head airbags ]
Also called the head side curtain airbags , pop-up covered the windows in the collision , to achieve the effect of protecting passengers.
Head airbags mainly for occupant 's head during side impact protection. B-pillar side window glass , or even a seat belt buckle side support are likely to become a car accident killer. Then head airbags , and these things will be separated by the members .
Head airbags mounted in the roof of curved steel beams , front and rear are usually run through the body by the lateral acceleration sensor. When the lateral acceleration greater than normal , and the value will reach dangerous controlled detonation . For severe side-impact accidents , rollovers , etc. have a good personnel protection.
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【Article is excerpted from: Web Search】
【Reserved Integrate / Just Reference】
【Translation is by The Network】
