- Tytuł:
- The influence of fuels chemical composition on its lubricity : new views on the mechanism of protectionlayer creation during tribological process
- Autorzy:
-
Kulczycki, A.
Ozimina, D. - Powiązania:
- https://bibliotekanauki.pl/articles/243805.pdf
- Data publikacji:
- 2016
- Wydawca:
- Instytut Techniczny Wojsk Lotniczych
- Tematy:
-
mechanical engineering
fuel
oils
lubrication - Opis:
- The aim of this paper is to examine the current views on the mechanism of the formation of a protective film by mineral fuels and biocomponents (FAMEs and alcohols). As the experimental data show, the ability of fuels / biofuels to form a protective film under different conditions is very important to the efficient operation of fuel pumps. The mating parts of pumps are protected against wear and seizure because of the interactions between the metal surfaces and the lubricant (fuel / biofuel) at the molecular level. The tribochemical research focuses on the tribochemical reactions of lubricating additives because the base fuel is frequently treated as a solvent only. Today, most fuels for CI engines contain FAME, a biocomponent that may differ in the chemical structure depending on the type and properties of the vegetable oil used. The current trend is to produce fuels from biomass hydrocarbons, which are blended with mineral diesel fuel. It has been found that the chemical structure of biohydrocarbons is responsible for changes in the lubricity of the blends. Lubricity is determined using a standard high frequency reciprocating rig (HFRR) test because of one parameter, i.e. the wear of the ball. The results of the authors’ previous studies were used to create a new model of the protective film formation by fuels containing biocomponents (oxygenates) and biohydrocarbons. The model makes it possible to describe the tribochemical processes quantitatively. The quantitative analysis is based on the parameter αi, which is the measure of reactivity of lubricating additives and/or biocomponents related to the properties of the mating parts and the operating conditions in a tribological system. The new approach to the mechanism of the protective film formation, based on the quantitative description of tribochemical reactions, enables us to begin research on new criteria for the lubricity of fuels containing lubricating additives and biocomponents.
- Źródło:
-
Journal of KONES; 2016, 23, 1; 178-184
1231-4005
2354-0133 - Pojawia się w:
- Journal of KONES
- Dostawca treści:
- Biblioteka Nauki