| Abstract [eng] |
The aim of the final work is to investigate the efficiency of hybrid drives in heavy transport. The analysis of the literature in the work reviews the hybrid heavy transport and the components used to form a hybrid power drive. Research comparing the advantages of hybrid vehicles over conventional vehicles has been analyzed in the literature. A preliminary layout diagram of the hybrid tractor power plant is made and the principle of operation is described. Calculations based on the ECE15, EUDC and NEDC driving cycles have shown that hybrid tractors are the most efficient to use in urban conditions, increasing truck efficiency at 0% load, 22.5% energy consumption and 62.5% lower fuel consumption when loading. levels of 50% to 13.6% in terms of energy consumption and fuel savings of up to 61%. With a vehicle with 100% mass, efficiency increases with 9.7% energy consumption and 60.4% lower fuel consumption. In off-road conditions, hybrid tractors lose the advantage of an unladen vehicle with 3.5% lower energy and 5.1% lower fuel consumption. As the load increases to 50%, efficiency decreases and can reduce energy consumption by 2.2% and fuel consumption by 4.6%. At a truck load level of 100%, the energy consumption of a hybrid tractor is reduced by 1.6% and fuel savings of up to 4.35%. In urban and suburban conditions, the hybrid with its own weight has 10.2% lower energy and 25.4% lower fuel consumption. When the charge level increases to 50%, energy consumption is reduced by 6.3% and fuel consumption is reduced by 24.9%. As the mass level increases to 100%, the hybrid tractor has 4.5% lower energy consumption and 24.6% lower fuel consumption than usual. Compared to the works of other authors, the results of research differ by 1.4% in terms of energy consumption in urban areas and 12.72% on the highway areas. In terms of fuel consumption on the highway, the results differ by 0.65% and 1.67%. |
