Airbag

Airbag is a passive safety system that inflates instantaneously during a collision to protect the driver and passengers’ heads, chests, and other vital areas. It aims to minimize injuries by supplementing the function of the seat belt.

Working Principle

The airbag system is triggered by the control unit based on data received from accelerometers and impact sensors mounted on the vehicle. Upon detection of a sudden impact, the pyrotechnic gas generator within the airbag module ignites, causing the airbag to inflate within milliseconds and form a protective cushion between the occupant’s body and rigid components. The airbag deflates gradually shortly after the crash.

Hardware/Software

• Airbag module (airbag, sensors, igniter gas cartridge)
• Electronic control unit (ECU)
• Accelerometers and impact sensors
• Integrated safety systems (seat belt pretensioner, ABS, ESP)
• Software-based collision algorithms

Applications

• Driver and front passenger protection
• Side airbags (inside door or seat edge)
• Curtain airbag (above windows)
• Knee airbag
• Rear passenger airbag systems
• External airbag applications in some premium vehicles

Advantages

• Significantly reduces the risk of serious injury.
• Lowers fatality rates when used in conjunction with seat belts.
• Provides multi-directional protection (front, side, curtain, knee).
• Operates automatically without requiring human intervention.