What is the side air curtain assembly on the car roof
The car roof side air curtain assembly (also known as the head airbag air curtain) is A safety device installed on both sides of the roof, usually extending from the A-pillar to the C-pillar, used to protect passengers' heads in the event of a side collision or rolover accident.
Core function
When a vehicle is hit from the side or rolls over, the air curtain triggers the inflation device through sensors, covering the window and door areas within 0.1 seconds to form a buffer barrier, reducing the risk of direct collision between the head and hard objects such as the window glass and B-pillar.
Structural composition
It is mainly composed of gas bags, gas bag covering cloth, gas generators, brackets and conduits. When the collision is triggered, the gas generator releases gas (such as nitrogen), pushing the gas bag to unfold and form a protective barrier.
Installation location
It is usually located within the arc-shaped steel beam on the roof, covering the area from the A-pillar to the C-pillar. Some models are only equipped with it in the front row, while in the rear row, it is installed at the rear of the roof.
The core function of the car roof side air curtain assembly (also known as the side safety air curtain) is to form a curtain protective barrier by rapidly inflating in the event of a side collision, preventing passengers from directly colliding with hard components such as the car Windows and B-pillars, thereby reducing the risk of head, neck and chest and abdominal injuries.
Key protection mechanism
Youdaoplaceholder0 0.03-second rapid response : Instantly ejected upon detection of a collision, covering the Windows and B-pillar area, reducing the direct contact time between occupants and hard objects inside the vehicle.
Youdaoplaceholder0 Multi-dimensional buffering : By expanding gas to form a flexible barrier, it slows down the lateral displacement inertia of the head and reduces the risk of cervical spine injury.
Youdaoplaceholder0 used in conjunction with seat belts : The best protection effect can only be achieved when used in conjunction with seat belts. Using them alone may cause a risk of secondary impact.
Trigger condition
It is usually triggered at a collision speed of 40-50km/h, with the coverage extending to the chest and abdomen of the occupants, significantly reducing the probability of injury to key parts.
The side air curtains of automobiles play a significant protective role in side collisions and rollover accidents , effectively reducing the risk of injury to the head, chest and abdomen of occupants, and are an important component of the vehicle's passive safety system.
The core function and working mechanism of the side air curtain
Youdaoplaceholder0 Head and body protection : The side air curtains cover the window area, forming a buffer barrier in the event of a collision to prevent passengers' heads from directly hitting hard structures such as the B-pillar and window glass. At the same time, the coverage can extend to the chest and abdomen, reducing the impact force on key areas.
Youdaoplaceholder0 multi-scenario protection :
For side collisions: When the lateral acceleration exceeds the safety threshold, the air curtain rapidly expands within 0.03 seconds, buffering the impact of a collision at a speed of 40-50km/h.
Dealing with rolleover accidents: The side air curtains of some models (such as the Starry L) can be continuously inflated to prevent secondary collision injuries and adjust the protective status in real time through sensors.
Youdaoplaceholder0 Configuration differences and synergies
Youdaoplaceholder0 vehicle configuration gradient :
Mid-to-low-end models usually only come with front side air curtains.
High-end models can be covered by 18 air curtains throughout the vehicle, providing more comprehensive protection.
The coordination of with the safety system : Side air curtains need to be used in conjunction with seat belts and side airbags to form a three-dimensional protection network. For instance, side airbags protect the trunk, while air curtains focus on cushioning the head. Together, they reduce the risks of rib fractures, cervical spine injuries, etc.
Youdaoplaceholder0 Key points for use and maintenance
Youdaoplaceholder0 Do not block : Do not place any decorations in the longitudinal beam area of the roof to prevent affecting the expansion of the air curtain.
Youdaoplaceholder0 Maintenance requirements : After a collision, the air curtain system, including key components such as sensors and inflation devices, must be inspected by a professional institution.
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