USAGE OF ORGANIC SURFACE ACTIVE AGENT AS ANTI-WEAR ADDITIVES TO DIESEL FUEL

The article provides analysis of the main directions for efficiency increase of diesel fuel sage for automotive and tractor equipment. The purpose of the study is to substantiate rational concentration of antiwear additive for diesel fuel containing surface active agent of organic origin. The possibility of using vegetable oils (flax, mustard and rapeseed) and their individual components (oleic acid) in low concentrations (up to 10%) as antiwear additives to diesel fuel is considered. According to results of laboratory studies on a tribometer of TU type with a four-ball friction unit, appropriate concentrations of antiwear additive were determined. According to results of the experiments, it was found that inclusion of up to 10% of vegetable oil (flax, mustard and rapeseed) to diesel fuel allowsto increase tribological properties of the fuel without negative effects. In this case, appropriate concentration is 2%, which allows to get maximum increase of tribological properties with minimumcosts of the additive. When using oleic acid, a concentration of 2% is also appropriate, but when the concentration exceeds 4%, there are such conditions in friction pairs that are favorable for the effect of adsorption strength decrease of the rubbing surfaces, which leads to an increase oftheir wear. Oleic acid application in the amount of more than 4% is considered impractical.