Teslia V. Enhancement of vehicle use safety by improving the methods of evaluating the dynamic and energy characteristics

Object of research - vehicle dynamics in a traffic flow at variable operation factors and mechanical condition. The goal of research - to ensure safety of vehicular transport through increasing the vehicle functional stability by improving the methods for assessing its energy characteristics in dynamic conditions. Methods - in the theoretical part of the scientific work there were used the methods of mathematical modeling and classical mechanics. In the experimental part of the paper there were applied the methods of field testing and electric measurement of physical quantities and partial accelerations. Novelty - for the first time there was obtained the dependence of the necessary supply of engine power on the conditions of car overtaking on the track with a two-way traffic on the basis of determining the impact of vehicle movement parameters, which performs overtaking, as well as the preceding and oncoming traffic. It has been offered to conduct the evaluation of the vehicle operating time according to the motor mechanical work done on the basis of the obtained relationship between the acceleration of the vehicle and its engine power. The method of partial acceleration upon which there were improved the methods of technical state control and vehicle dynamic tests carrying out, which made it possible to improve the method of determining the total mass of the car during its movement through the definition of new relationships between the accelerations at different loading has obtained further development. The method of determining the appropriateness of unplanned vehicle maintenance depending on its fuel consumption and the vehicle operating time in the period between the planned maintenance has obtained further development. The results obtained were applied at Kharkiv Research Institute of forensic examinations after the Honored Professor M. S. Bokarius - the method of assessing the impact of current and maximum engine power on safe overtaking maneuver performance in the practice of conducting judicial autotechnical examination and investigation of road accidents, as well as at Shebelinsk subbranch of utility vehicles and specialized drilling machinery of the transport management department "Ukrburhaz" - the method of determining the effective capacity of the engine in motion and evaluating its technical condition according to changes in specific fuel consumption during operation in practice of maintenance and repair of vehicles. Field of application - road transport.