Article 2 #4' 2025

View of the Article PDF:  2_Trohymchenko (5)
ISSN 2958-0757
© Volodymyr Sakhno, Doctor of Technical Sciences,
Professor, Head of the Automobile Department,
ORCID: 0000-0002-5144-7131, e-mail: svp_40@ukr.net;
© Oleksandr Razboinikov, Ph.D.,
Associate Professor of Department of Automobiles,
ORCID: 0000-0003-3024-0999,
e-mail: razboyn1k@ukr.net
(National Transport University);
© Oleksii Bugryk, Ph.D., Researcher,
ORCID:0000-0003-4581-3294,
e-mail: bugrikalex@gmail.com;
© Volodymyr Trokhymchenko, Deputy Head
of the Department, Postgraduate Student
ORCID: 0000-0002-8276-8675,
e-mail: vtrohymchenko@insat.org.ua
(SE «State Road Transport Research Institute»)
RESEARCH ON THE IMPACT OF SPEED HUMPS ON THE VARIATION
OF VERTICAL REACTIONS IN TIRE-ROAD CONTACT
DOI: 10.33868/0365-8392-2025-4-285-9-15
Abstract. The types and kinds of road irregularities are considered, and the parameters of the selected road irregularities for the research were chosen and described. To conduct experimental research, a measuring complex was developed that allows recording the parameters necessary during the research. Theoretical and experimental investigations were conducted on the impact of artificial road irregularities on the vertical oscillations of sprung and unsprung masses of the vehicle. A comparative analysis of the conducted studies was performed. The adequacy of the mathematical model, on which theoretical dependencies of the vertical oscillations of sprung and unsprung masses of the vehicle were obtained during the passage of an artificial road irregularity at a speed of 45 km/h (12.5 m/s), was confirmed. Based on the calculations performed using the developed mathematical model, theoretical data was obtained regarding the change in vertical reactions at the contact between the wheel tires of the vehicle’s axles and the road when crossing an artificial road irregularity at a speed of 45 km/h (12.5 m/s). Research was conducted on the change in fuel consumption of automobile when overcoming selected types of road irregularities. The obtained data indicate that fuel consumption varies within very wide limits depending on driving conditions. Further analysis of the obtained fuel consumption results will make it possible to estimate the amount of pollutant emissions into the environment and to estimate the economic losses caused by each type of road irregularities.
Keywords: automobile, road irregularities, measuring complex, theoretical and experimental research, the vertical oscillations of sprung and unsprung masses, fuel consumption, environmental pollution, reactions in contact of tires with the road.
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