Influence of fractional composition of fuel on engine performance

Abstract

The fractional composition of the fuel is associated with the operational characteristics of engines, in particular, the temperature regime and start-up, the tendency to form steam locks in the fuel system, and fuel costs. In the case of using fuel with an octane number lower than that required for this engine, knocking occurs. Therefore, the fuel must be knock-resistant, i.e. the ability to burn in the engine at rated speed without explosions. The chemical stability of the fuel is also important - the ability to resist the formation of tar and oxidation during a certain (induction) period at a temperature of 100° C. The physical stability of the fuel is characterized by the absence of light fractions that evaporate during storage and transportation of gasoline. Fuel contamination is caused by the ingress of various mechanical impurities or water into its composition during storage and transportation. The presence of these impurities affects the performance of the fuel system, clogs it, as a result of which it fails, and in winter can lead to its freezing. Thus, the fractional composition of the fuel should be such that a good start of the engine and rapid acceleration of the power plant, low specific fuel consumption, uniform qualitative and quantitative distribution of the combustible mixture over the engine cylinders, minimal wear of pistons and cylinders are ensured, which confirms the relevance of studies aimed at study of the influence of the fractional composition of fuel on the performance of the engine.