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Chandra pal Singh Shekhawat
VtU 6641
Mechanical Department
AIRBAGS: A Safety Restraint
System of an automobile
INTRODUCTION
Seat belts provided the sole form of safety in
cars.
Airbags were developed.
A soft pillow to land against in a crash.
They are gas-inflated cushions.
The first patent on an inflatable crash landing
device was filed during World War II.
Airbags are the subject of serious scientific
research and tests.
MAIN PARTS OF AN AIRBAG
 Bag
Made of thin nylon fabric,folded into a steering wheel
or dashboard or more recently the door or seat.
 Sensor
Tells the bag to inflate
 Inflation system
The rapid pulse of hot nitrogen gas to inflate the bag.
2 NaN3 → 2 Na + 3 N2 (g)
10 Na + 2 KNO3 → K2O + 5 Na2O + N2 (g)
K2O + Na2O + 2 SiO2 → K2O3Si + Na2O3Si (silicate glass)
This is how it takes place..
MECHANICAL CRASH SENSORS
• CRASH SENSOR WITH DAMPING
BALL IN-TUBE SENSOR
THE AIRFLOW GENEARTES AN AERODYNAMIC DRAG FORCE THAT DAMPENS THE
BALL MOTION.
• SPRING MASS SENSOR
ROLOMITE SENSOR
Roller- suspended with a tensioned baned.
Substantial collision- roller overcomes a spring force and rotates forward.
Impact-moving contact of the metallic band touches a fixed contact and
closes a circuit.
Parameters- distance of trigger
- magnitude of the spring.
Future of airbags
 Smart Restraint Systems
Adapts its geometry, performance or behavior
to suit various impacts and occupant position.
Includes weight sensors.
Determine type of occupant in the seat. i.e
child or adult.
Detect the distance of passenger from airbags.
Airbag checks
Turn the key and look at the dashboard to find
the airbag light on for 7-10 sec. & then it goes
off.
Problems occur when
•
•
•
1. Light does not come on.
2. If light does not go off after the period.
3. If light comes while driving.
THANK YOU

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Air Bag Concept by CHANDRA PAL SINGH SHEKHAWAT

  • 1. Chandra pal Singh Shekhawat VtU 6641 Mechanical Department
  • 2. AIRBAGS: A Safety Restraint System of an automobile
  • 3. INTRODUCTION Seat belts provided the sole form of safety in cars. Airbags were developed. A soft pillow to land against in a crash. They are gas-inflated cushions. The first patent on an inflatable crash landing device was filed during World War II. Airbags are the subject of serious scientific research and tests.
  • 4. MAIN PARTS OF AN AIRBAG  Bag Made of thin nylon fabric,folded into a steering wheel or dashboard or more recently the door or seat.  Sensor Tells the bag to inflate  Inflation system The rapid pulse of hot nitrogen gas to inflate the bag.
  • 5. 2 NaN3 → 2 Na + 3 N2 (g) 10 Na + 2 KNO3 → K2O + 5 Na2O + N2 (g) K2O + Na2O + 2 SiO2 → K2O3Si + Na2O3Si (silicate glass)
  • 6. This is how it takes place..
  • 7. MECHANICAL CRASH SENSORS • CRASH SENSOR WITH DAMPING BALL IN-TUBE SENSOR THE AIRFLOW GENEARTES AN AERODYNAMIC DRAG FORCE THAT DAMPENS THE BALL MOTION.
  • 8. • SPRING MASS SENSOR ROLOMITE SENSOR Roller- suspended with a tensioned baned. Substantial collision- roller overcomes a spring force and rotates forward. Impact-moving contact of the metallic band touches a fixed contact and closes a circuit. Parameters- distance of trigger - magnitude of the spring.
  • 9. Future of airbags  Smart Restraint Systems Adapts its geometry, performance or behavior to suit various impacts and occupant position. Includes weight sensors. Determine type of occupant in the seat. i.e child or adult. Detect the distance of passenger from airbags.
  • 10.
  • 11. Airbag checks Turn the key and look at the dashboard to find the airbag light on for 7-10 sec. & then it goes off. Problems occur when • • • 1. Light does not come on. 2. If light does not go off after the period. 3. If light comes while driving.