EXPERIMENTAL EVALUATION OF METHODS FOR CALCULATING VEHICLE ACCELERATION TIME

Abstract

The article demonstrates that the advancement of automobiles inevitably leads to a dramatic increase in the complexity of the mathematical description of their motion. Modern vehicles are complex technical systems comprising numerous interconnected components and subsystems - electronic, mechanical, hydraulic, and pneumatic - each of which influences the overall dynamic properties of the vehicle. Consequently, the use of simple analytical relationships becomes ineffective: they do not fully account for the real physical processes occurring during acceleration, braking, gear shifting, or changing road conditions. To calculate acceleration time standards during vehicle diagnostics, it is advisable to use numerical methods that allow for the consideration of a large number of parameters, including engine power and torque, transmission characteristics, air and rolling resistance, mass distribution, and road surface conditions. Such methods ensure the required accuracy regardless of the complexity of the mathematical model and allow for the description of nonlinear processes, transient conditions, and random parameter deviations.

The use of numerical models also opens up extensive opportunities for conducting virtual tests and preliminary predictions of vehicle performance without the need for costly in-kind experiments. This is especially important when developing automatic diagnostic systems that can analyze unit operating parameters in real time and identify deviations from the norm. Furthermore, numerical methods make it possible to optimize vehicle design at the design stage, select optimal engine and transmission operating modes, reduce fuel consumption, and improve driving safety. The ideas presented in the article are supported by calculations of specific examples and a comparison of the obtained results with experimental data, demonstrating the validity and practical applicability of the proposed approach. The results of this work can be used in the development of intelligent technical control systems, modeling vehicle dynamics, and improving methods for assessing their performance.

Key words: car, wheel, acceleration, calculation, numerical methods, discretization, step, Hyundai Accent, Honda Accord.