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Verification of the emergency body lifting system based on pneumatic suspension

Mykhalevych Mykola, Yaryta Oleksandr, Shapovalenko Vladyslav, Don Evgeny

Diagnostyka

2025

Vol. 26, No. 4

art. no. 2025409

Car accidents are the leading cause of death, with 1.2 million deaths each year, despite improvements in car safety, and forecasts indicate that road traffic fatalities will increase significantly by 2030 due to the increasing number of cars. This trend requires increased passive safety in car design. During independent crash tests that test the side safety of the driver and passengers, the impact energy is distributed and absorbed by the side sills, door pillars and safety bars located inside the doors. Unfortunately, there are no crash tests between cars of different mass and dimensions, for example, when a passenger car is hit from the side by an SUV. The main problem is that the height of the crossbar with crash boxes in an SUV is higher than the safety bars in the doors of a passenger car. Thus, it is difficult to predict the distribution of kinetic energy of the impact and the degree of injury to the driver and passengers of a passenger vehicle. A study of experimental emergency body lifting systems based on an electro-mechanical system and a hydropneumatic system at the moment of a side impact has been conducted. Such a system allows for 0.5 seconds to raise the car body to a height of 85 millimeters relative to the zero position and reduce injuries by 50% on the side where the side impact will occur. Using mathematical modeling, the functioning of the system and the possibility of implementing an emergency body lifting system based on a pneumatic suspension system were analyzed.