THERMAL SCIENCE

International Scientific Journal

Authors of this Paper

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Stefan V. Milićević

,

Ivan A. Blagojević

MANAGING FUEL CONSUMPTION AND EMISSIONS FOR HYBRID ELECTRIC VEHICLES THROUGH OPTIMIZATION OF ENGINE OPERATION

ABSTRACT
This paper presents a multi-objective optimization framework for improving internal combustion engine performance in hybrid electric vehicles, specifically targeting the minimization of fuel consumption and emissions (CO, NOx, HC, PM). The proposed method integrates normalized objective functions with weighted factors to develop a unified performance index, facilitating the simultaneous optimization of multiple conflicting objectives. Utilizing the NSGA-II algorithm, a diverse set of Pareto optimal points is generated, each representing different trade-offs between the objectives. The study’s results demonstrate significant improvements in engine performance through the application of the unified internal combustion engine operation map, showcasing a notable reduction in emissions with only a slight increase in fuel consumption. The methodology was validated via MATLAB simulations on two case studies involving parallel and series hybrid electric vehicles, employing a custom synthesized drive cycle for energy management strategy evaluation. The unified map enabled real-time control and efficiency improvements by balancing different emission parameters, thus optimizing internal combustion engine operation across various conditions.
KEYWORDS
internal combustion engine, engine optimization, hybrid electric vehicle, multi-objective optimization, Fuel economy, pollutant emission
PAPER SUBMITTED: 2024-11-24
PAPER REVISED: 2024-12-31
PAPER ACCEPTED: 2025-01-06
PUBLISHED ONLINE: 2025-02-16
DOI REFERENCE: https://doi.org/10.2298/TSCI241124025M
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2025, VOLUME 29, ISSUE Issue 5, PAGES [3545 - 3560]
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Managing fuel consumption and emissions for hybrid electric vehicles through optimization of engine operation

2025 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence