The influence of tire defects on traffic safety emergency rescue car

Volodumur Kokhanenko

National University of Civil Defence of Ukraine

https://orcid.org/0000-0001-5555-5239

Serhii Rahimov

National University of Civil Defence of Ukraine

http://orcid.org/0000-0002-8639-3348

DOI: https://doi.org/10.52363/2524-0226-2022-35-14

Keywords: emergency rescue vehicle, pneumatic tire, temperature distribution, defects, reliability, safety

Аnnotation

Modern emergency and rescue vehicles, like all others, are equipped with tires of radial design with a metal cord in the breaker. It was determined that the number of premature and unpredictable exits of such tires from operation due to the destruction of the shoulder zone and delamination in the breaker has increased. Since emergency and rescue vehicles are constantly in operational readiness (they are loaded with fire-extinguishing substances, special tools and equipment during the entire period of operation), and when called, they move at maximum speed, their tires are also in extreme operation mode. Emergency and rescue vehicles are equipped with serial tires. But, firstly, emergency rescue vehicles significantly exceed the limits of operating modes, and secondly, in the course of time, they do not reach the standard tire mileage. So, on the outside, the tires have a fairly deep tread pattern, but inside they have accumulated many defects, which leads to their premature retirement, which is unacceptable. In order to realize the resource of the tread before complete wear and increase the reliability of operation of tires of emergency and rescue vehicles, it is necessary to determine the reasons for the premature retirement of tires. When investigating the causes of tire failure, it was established that the presence of defects, both internal and external, worsens heat dissipation from the frame and from all layers of the tire. These phenomena lead to the unexpected sudden exit of tires from operation. Reasoned proposals for the design of emergency and rescue vehicle tires. On the basis of research, it is proposed to equip emergency rescue vehicles with tires of a special design, which is provided in the work. The obtained data will increase the reliability and safety of the movement of emergency and rescue vehicles when following them to the place of the call.

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