INFLUENCE OF OLEIC ACID FOR AUTOTRACTOR DIESEL FUEL TRIBOLOGICAL PROPERTIES

Research objective is to increase anti-wear properties of diesel fuel introduction small (to 10% on volume) doses of the oleic acid applied as anti-wear additive. The technique and results of vegetable oils used as components of mixed fuels structure assessment which showed that all of them contain significant amount of unsaturated fatty acids – olein, linoleic and linolenic are given. By results of research the hypothesis of anti-wear additive use to diesel fuel quality possibility of oleic acid is made. For confirmation of hypothesis basic researches of anti-wear properties of fuels with additive of oleic acid were conducted. Researches were conducted by the universal tribometer. Concentration of oleic acid in fuel changed from 0 to 10% on volume with a step to 2%. Loading, rotating speed of spindle and material of parts of a frictional unit didn't change. Researches showed that, for example, at concentration of oleic acid of 2% on volume the average diameter of a spot of wear decreased by 17.7% (from 0.508 mm when using diesel fuel without additives up to 0.418 mm at addition of 2% of oleic acid). At concentration of oleic acid of 4% the average diameter of a spot of wear decreased by 22.9% of initial. At further increase in concentration of oleic acid (6, 8 and 10% on volume) decrease in diameter of a spot of wear made according to 21.6%, 18.9% and 13.7%, i.e. at increase in concentration of oleic acid over 4% anti-wear properties of diesel fuel worsen that is connected, apparently, with emergence in interface of effect of Rebinder. It is established that for substantial increase of anti-wear properties of diesel fuel it is enough to enter into its structure 2-4% of oleic acid on volume. Further increase in concentration of anti-wear additive leads to decrease in effect of its use

biocomponent, fatty acid, acid, oleic acid, additive, anti-wear