METHOD FOR EVALUATION OF TENDENCY OF MOTOR FUEL TO FORM HIGH TEMPERATURE DEPOSITS Russian patent published in 2017 - IPC G01N33/22 

FIELD: petroleum industry; test methods.

SUBSTANCE: invention relates to methods of testing oil products, in particular, motor fuel. Proposed method comprises feeding fuel into liquid droplet state at atmospheric pressure in air, heated to temperature of engine working charge, with an interval equal to time of free fall of droplets, during which there is heating, evaporation, ignition, combustion and heat conversion of fuel droplets, subsequent measurement of weight of deposits on hated place made of catalytically active material heated, installed an angle of 15–45° to horizontal surface, wherein factors are given for conditions of process of formation of deposits, forming from 17 test cycle stages as required and minimum sufficient set of test modes in form of a matrix, after each stage of test cycle fuel (fuel composition) measuring weight of deposits on plate, upon completion of test cycle determining generalized index M_isp of tendency of tested fuel (fuel composition) to form high temperature deposits, comparing obtained value with value of said index for fuel (fuel composition), taken as reference M_et, that has passed identical test cycle, and if M_isp<M_et, fuel (fuel composition) is recommended for use in a specific engine, wherein generalized index M_{isp (et)} for tendency of tested fuel (fuel composition) to form high temperature deposits is calculated by a given formula.

EFFECT: higher efficiency of evaluation results.

1 cl, 3 tbl, 1 ex