ASSESSMENT OF THE IMPACT OF THE GROUP COMPOSITION OF DIESEL FUELS ON THE EFFICIENT PERFORMANCE OF AUTOMOTIVE DIESEL ENGINES

Abstract

The group composition of diesel oil (DO) predetermines the basic physical, chemical and calorific properties of fuel, which have a significant impact on the processes of evaporation, ignition and combustion of fuel in the diesel engine and, consequently, on its performance and fuel economy indicators. The group composition of diesel oil of various grades is characterized by a certain content in it of various hydrocarbon components and chemical compounds. One of the effective methods of researching the group composition of diesel oil is chromatography-mass spectrometry. Chromatographic separation of summer and winter diesel fuel into hydrocarbon components and chemical compounds, as well as their mass-spectrometric analysis were carried out on a chromato-mass-spectrometer of the Chromatec company. The obtained mass-spectra of hydrocarbon components and chemical compounds made it possible to determine the group composition of diesel fuel brands DT-L-K5 and DT-Z-K5. The results of test-bench runs of an automobile diesel engine D-245.12C show that the engine produces the maximum effective power when running on summer diesel and less power when running on winter diesel. Fuel efficiency indicators (hourly and specific effective fuel consumption) of the diesel engine at its operation on winter diesel oil is better in comparison to the operation on summer diesel oil. The highest values of effective efficiency are observed when the diesel is operated on winter diesel oil.

Keywords

• diesel oil
• chromatography-mass spectrometry
• group composition
• diesel
• efficient indicators