Article 3 #1'2024

© Volodymyr Lomakin, Ph.D. in Engineering, Teacher of Department of Automobile Transport, e-mail: rootsymbol@gmail.com, ORCID: 0000-0002-8159-0166; © Serhii Melnychuk, Ph.D. in Engineering, Head of Department of Automobile Transport, e-mail: sergij.m@ukr.net (Zhytomyr Agricultural Technical Professional College) © Bogdan Yemets, Ph.D. in Engineering, Teacher of Department of Automobile Transport, e-mail: bogdan1199@ukr.net, ORCID: 0000-0003-1015-8859; © Oleksandr Ryabchuk, Ph.D. of Agricultural Sciences, Head of the General Technical isciplines Department, e-mail: nostradamus1969@ukr.net, ORCID: 0009-0009-1154-3194 (Zhytomyr Agricultural Technical Professional College) Cars Efficiency During Worldwide Harmonized Light-duty Vehicles Test Cycles Abstract. Automobiles have attained a prominent position in the modern world, exerting a significant influence on various aspects of our lives. However, they also bring about negative effects, particularly in terms of ecology and safety. The ecological impact  of automobiles stems from the energy sources they rely on and the pollution generated during their production. In this paper, our focus is on examining the efficiency of different energy sources used in automobiles, particularly how they have evolved over the past 10-15 years. During this time frame, there has been a notable shift in the energy sources employed by automobiles, with a departure from fossil fuels in favor of greener alternatives like electrical batteries. This transition not only addresses environmental concerns but has also prompted changes in car design, resulting in enhanced overall efficiency. To assess the efficiency of modern cars, we base our study on the Worldwide Harmonized Light-Duty Vehicles Test Cycles (WLTC), like most modern cycle. The WLTC is a standardized testing procedure that measures various parameters related to vehicle performance and energy consumption. By applying the energy-work theorem, our research aims to compare the efficiency of cars equipped with internal combustion engines, plug-in hybrids, and fully electric systems. Which gives all basics requested data to analyze different types of cars. Our analysis specifically focuses on the top 10 cars in the Ukrainian market for the year 2021. By examining their efficiency, e can gain valuable insights into the current state of automobile technology and evaluate how different energy sources perform in terms of energy consumption and overall vehicle efficiency Keywords: WLTP, energy consumption, vehicle energy losses, vehicle efficiency, energy per WLTC, car fuel efficiency, car battery usage efficiency. References 1. Zhang, X., et al. (2019). Efficiency Analysis of Battery Electric Vehicle Powertrains. Applied Sciences, 9(8), 1557. https://www.mdpi.com/2076- 3417/9/8/1557 [Accessed august 2023] 2. Azadi, S., et al. (2019). Efficiency Analysis of Hybrid Powertrains: A Review. 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