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Analysis of fuel economy indicators of a wheeled tractor during transportation of partially filled tankers
1
Department of Car and Tractor Industry, National Technical University “Kharkiv Polytechnic Institute”, Ukraine
2
Department of Engines and Hybrid Power Plants, National Technical University “Kharkiv Polytechnic Institute”,, Ukraine
3
Department of Agroengineering, Sumy National Agrarian University, Ukraine
4
Department of Tractors and Automobiles, National University of Life and Enviromental Sciences of Ukraine, Ukraine
Submission date: 2026-01-09
Final revision date: 2026-03-16
Acceptance date: 2026-04-10
Online publication date: 2026-04-22
Corresponding author
Serhii Kravchenko
Department of Engines and Hybrid Power Plants, National Technical University “Kharkiv Polytechnic Institute”,, Kharkiv, Ukraine
Department of Engines and Hybrid Power Plants, National Technical University “Kharkiv Polytechnic Institute”,, Kharkiv, Ukraine
KEYWORDS
TOPICS
ABSTRACT
This study examines the fuel performance characteristics of a wheeled tractor transporting a trailer tank under varying load conditions within standardized driving cycles (ELR, EPA, and NRTC). A mathematical model of the tractor–trailer system was developed in MATLAB/Simulink, incorporating the dynamics of the FPT NEF 67 internal combustion engine, the transmission and wheel drives, as well as the effects of fluid redistribution in the tank. The model enables evaluation of instantaneous fuel consumption, specific fuel consumption, effective power, and engine efficiency under dynamic operating modes. Particular attention is given to the impact of fluid sloshing on energy expenditure, which is most pronounced at a tank fill height of 1.3 m (out of 1.6 m), corresponding to resonance conditions. The results demonstrate that the dynamic characteristics of the driving cycles have a significant impact on additional fuel consumption: NRTC yields the highest relative increase (9.22%), EPA the highest absolute increase (6.76%), and ELR the lowest (4.72%). These findings provide a basis for optimizing tractor operation during liquid cargo transport and for assessing the potential benefits of hybridizing tractor transmission systems in transport applications.
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