Airbag accumulator working pressure

How accurate is the initial air pressure range of an airbag?

The traditional air suspension airbag delimits the initial air pressure range based on the bearing capacity of the airbag material, so the range of the pressure is inaccurate. Considering optimizing ride comfort of the vehicle, this paper proposes a method to determine the accurate initial air pressure range.

Can airbag control valve modulate airbag pressure for optimum safety?

This work modulated airbag pressure for optimum safety using a novel airbag control valve for cold-gas inflators. This paper evaluates the valve’s stationary and dynamic performances for Helium by 3D flow simulations using a pressure-based solver in ANSYS Fluent® and SAE J2238 laboratory tank tests.

What is the optimal air pressure range of a vehicle airbag?

The optimal initial air pressure range of the vehicle airbag is between 14~16kPa (Figure 19). The rough range given in this paper is 12~20kPa. The length of the range is reduced from 8kPa to 2kPa, and the length of the accurate range is reduced to 1/4.

How to inflate an airbag?

In such cases, the airbag can be deployed and kept at a lower pressure until the occupant contacts the airbag. The pressure can be increased after contact. The control strategy of Test 3 can be applied to inflate the airbag with a minimum pressure of 0.9 bar at 25 ms. When the occupant impacts at 50 ms, the pressure can be increased again.

How does airbag pressure affect the restraint effect?

Airbag pressure determines the restraint effect during a vehicle crash. The pressure required to restrain the occupant depends on pre-crash detection, collision parameters and the occupant’s mass and position. This work modulated airbag pressure for optimum safety using a novel airbag control valve for cold-gas inflators.

What happens if airbag pressure is too high?

The occupant hits the vehicle structure if the bag pressure is too low, the problem in rearward seat occupancy. If the pressure is too high, then the probability of head injuries increases due to the airbag’s stiffness, commonly seen in forward seating positions [ 3, 4, 10 ]. Hence, finding the correct pressure for different positions is crucial.